NO

Leica Code	Description	Production Year	Remarks
NAKUL	Film viewer with magnifier and indicator punch; with handle; the 250 version has side cups to handle a long strip of film	1936-19??	-
NAMAS	Opal glass to fit behind the film in a film viewer	1930's	-
NATRA	Film viewer with magnifier and indicator punch; without handle	1932-19??	-
NOKUM	Close focus accessory with parallax for Summar f= 5 cm 1:2 lens (formerly NOOKY-HESUM)	1960-19??	16505
NOOBU	Film viewer without indicator punch	1951-19??	-
NOOKY	Close focus accessory with parallax for Elmar (I) f= 5 cm 1:3.5 lens	1935-19??	16500
NOOKY-HESUM	Close focus accessory with parallax for Hektor f= 5 cm 1:2.5 or Summar f= 5 cm 1:2 lens	ca.1935-1959	-
			-
OAGNO	Medical copy stand using PLOOT	1938-19??	-
OAPDO	Medical copy stand using PLOOT	1939-19??	Italian item
OCEGO	Leica Ig body	1957-1963	-
OCLOM	Visoflex II with 4x 90 magnifier, bayonet mount	1962-19??	-
ODULO	PROON reflex housing + PAMOO right-angle magnifier	1940-19??	-
OEFGO	Leica If	1952-1957	-
OEGIO	Leica Ic	1949-1952	-
OEUPO	Extension ring for Summicron (II) f= 9 cm 1:2 with !:4.5 reproduction ratio	1959-19??	16474
OHIKO	Stereo unit complete with Stemar lens OISBO, prism, and viewfinder for screw-mount cameras	1954-1957	-
OHIKO-M	Stereo unit complete with Stemar lens OISBO, prism, and viewfinder for M-mount cameras	1950's	-
OHTEO	OIPVO stereo viewer + OIFCO light unit	1950's	-
OHUGO	No. 1 light yellow filter; paired for Stemar mount	ca.1959	NY item
OHVIO	Orange filter; paired for Stemar mount	ca.1959	NY item
OHWLO	UVa filter; paired for Stemar mount	ca.1959	NY item
OIASO	Sremar stero lens for M-camera	1954-1957	-
OIDYO	Cylidrical chrome, half frame viewfinder used with Stemar stereo unit	1950's	-
OIFCO	Stereo light unit	1950's	-
OIGEO	Stereo lens hood for use on Stemar when prism is not attached	1950's	-
OIMPO	Prism for front of Stemar for subject distances beyond 10 feet; hinged front cover added in 1955	1950's	-
OIPVO	Stereo viewer with independently focusing eye pieces; brittle plastic housing	1950's	-
OIRZO-M	Stereo unit complete with Stemar lens OIGEO, prism, and viewfinder for M-mount cameras	1950's	-
OIRZO-S	Stereo unit complete with Stemar lens OIGEO, prism, and viewfinder for screw-mount cameras
OISBO	Stemar stereo lens	1950's	-
OIVHO	Rear cover for bayonet-mount Stemar	1950's	-
OIWKO	Lens cap with bayonet for Stemar	1950's	-
OIXMO	Rear cover for screw-mount Stemar	1950's	-
OIZQO	Rear cover for Stemar prism	1950's	-
OKARO	Orange filter to improve contrast between rangefinder images for FOKUS or Leica IIc, IIf, IIIb, IIIc and IIIf in chrome	1939-1962	14058
OKBZO	Diopter correction lens for near-sightedness for Leica IIIg	1960-19??	14064
OKLMO	Connecting piece to convert Focomat Ic enlarger to copy use with column VOOQF and arm OKYNO	1956-19??	16744
OKVCO	Diopter correction lens for astigmatism for Leica IIIg	1960-19??	14066
OKYNO	Arm for Focoslide Valloy II enlarger	1956-19??	16748
OKZPO	Copy stand 25 1/2 inch column with guide rail	19??-19??	16747
OLEYO	Single exposure camera with IBSOR shutter used with Elmar 3.5, 5, and 10.5 cm lenses	1934-1935	-
OLIGO	Single exposure camera with Ibsor shutter used a variety of lenses	1934-1939	-
OLLUX	Hood for 35mm f/1.4 Summilux I	1961-19??	-
OLORA	Single exposure camera without shutter	1936-19??	NY item
OMAPO	Close focus accessory with parallax for 50 mm 1:4 lens; per Lager: catalog item only, no known examples are known	1939	-
OMEXO	Complete copy stand including OOZEG, OOZAB, ZOOXY, VALOO, LVFOO, KGOON, OPKOM, ROOYH and ONLIO	1951-19??	-
OMIFO	Close focus accessory with parallax for Elmar (III) 1:4 / 90mm lens	1949-19??	-
ONLIO	Canvas carrying bag portion of OMEXO for Focoslide	1951-19??	-
OOBAZ	Late version focusing stage known as Focoslide for Screw-thread cameras using N series helical focusing lenses and extension tubes	1958-19??	16607
OOEUK	16 x 14 1/2 inch light box with 4 lamps	1951-19??	16763
OOEVM	9 1/2 x 7 inch light box with 4 lamps	1951-19??	16763
OOFRC	Remote shutter release and winder operated by two chords	1936-19??	-
OOGAN	OOBAZ Focoslide + VXZOO + VTOOX for Elmar f= 5 cm 1:2.8	1958-19??	16632, 16603-3/8" bush
OOGIT	OOBAZ Focoslide + VXOOT + VALOO for Elmar f= 5 cm 1:3.5	1958-19??	16633, 16604-3/8" bush
OOGUM	OOBAZ Focoslide + ZOGOO for Focotar	1958-19??	16634, 16612-3/8" bush
OOMAP	OOTGU Focoslide + ZOGOO for Focotar	1956-19??	16682, 16674-3/8" bush
OOMEX	OOTGU Focoslide + VXZOO + VTOOX for Elmar f= 5 cm 1:2.8	1958-19??	16633, 16604-3/8" bush
OOMYL	OOTGU Focoslide + VSPOO + VTROO for Summicron	1956-19??	16681, 16678-3/8" bush
OORES	Rotating focusing mount with screen; early versions with single lens; 1937 double; slide-in and bayonet versions	1934-1950's	-
OOTGU	Late version focusing stage known as Focoslide for M-cameras using N series helical focusing lenses and extension tubes	1957-19??	16680
OOZAB	Focusing stage known as Focoslide; early version had single bar on spring-loaded arm; later version with adjustable positioning bar; last version was H-shaped to clear flash bracket lug	1938-1957	-
OOZAB-G	Focusing stage known as Focoslide for accepting Leica IIIg camera	1951-1957	-
OOZEG	Folding horse-shoe type copy stand portion of OMEXO for Focoslide	1951-19??	-
OOZIS	Collapsible, horseshoe shaped copy stand	1939-19??	-
OOZKU	Set of 5 extension rings for OOZIS copy stand	1939-19??	-
OOZMY	Complete copy outfit including OOZAB, ZOOXY, ROOYH, VALOO, LVFOO and OPKOM release	1952-19??	-
OPDUR	Medical copy stand using OPRAL and OPFAS	19??-19??	-
OPFAS	Medical copy stand using frame with handle and chest support	1932-19??	-
OPKOM	Cable release portion of OMEXO for Focoslide; 20 inches with lock	1951-19??	-
OPRTO	Diopter correction lens for near-sightedness for Leica IIc, IIf, IIIb, IIIc and IIIf	1951-19??	14060
OPRYL	Medical copy stand using lower body strut with webbing sling	19??-19??	-
OPSVO	Diopter correction lens for astigmatism for Leica IIc, IIf, IIIb, IIIc and IIIf	1951-19??	14065
OQZIO	Diopter correction lens for near-sightedness for Viso magnifiers LVFOO and PEGOO	1960-19??	14063
ORAKO	Orange filter to improve contrast between rangefinder images for FOKUS or Leica II, III and IIIa in black or chrome	1936-1962	14057
ORBMO	Diopter correction lens for near-sightedness for Leica I-IIIa and Universal viewfinder	1941-19??	NY item
ORLEO	Diopter correction lens for astigmatism for Leica M-cameras to 1977	1956-1977	14062
ORESO	SPOOV copy stand + OORES rotating stage	1936-19??	-
ORMGO	Diopter correction lens for astigmatism for Leica I-IIIa and Universal viewfinder	1941-19??	NY item
OROLF	Lens turret for 3 lenses with handle; no more than 250 were made	1960	-
ORQPO	Hood for Summarex f= 8.5 cm 1:1.5; early version was black with clamping screw, later chrome for bayonet fitting	1951-1960	12525
ORTOX	Diopter correction lens for near-sightedness for Leica M-cameras to 1977	1951-1977	-
ORTUX	Diopter correction lens for near-sightedness for Leica I-IIIa and Universal viewfinder	1933-19??	14061
ORTVO	Cap that screws into body lens opening	19??-19??	14055
ORUXO	Diopter correction lens for astigmatism for Leica I-IIIa and Universal viewfinder	1938-19??	14069
ORWYB	Diopter correction lens for near-sightedness for Leica IIIb	1939-19??	NY item
ORYCE	Diopter correction lens for astigmatism for Leica IIIb	1939-19??	NY item
ORYFO	Rear dust cap for screw lenses	1951-19??	14050
OSBLO	Magnifying eye-piece for 5 or 9 cm screw lens; converts lens to small telescope	1954-19??	-
OSERO	Diopter correction lens for astigmatism for Viso magnifiers LVFOO and PEGOO	1960-19??	14069
OTDYM	Visoflex II without magnifier, bayonet mount	1962-19??	16455
OTEMO	Stemar attachment for subject distance of 3 - 10 meters; only 20 of these were delivered	1950's	-
OTPRO	1:1.25 magnification accessory for OTZFO focusing mount used with Visoflez II/ III	?	16471
OTQNO	Visoflex ring addapter for Elmar 9 cm	1959-19??	16468
OTRPO	Visoflex extension tube for near focusing with universal focusing mount	1959-19??	16471
OTSRO	Adapter for use of 13.5 cm Hector lens with OTZFO focusing mount used with Visoflex II/ III	1959-19??	16472
OTVXO	5x chimney eyepiece for Visoflex II	1962-19??	16461
OTXBO	4x 90 degree eyepiece for Visoflex II	1962-19??	16461
OTYDO	Visoflex II without magnifier, screw mount	1962-19??	16457
OTZFO	Focusing mount for Visoflex II/ III for use with 65mm Elmar, 90mm Elmarit and 135mm Elmar lenses	?	16464
OUAGO	Visoflex addapter for using Elmar 9 cm	1959-19??	16467
OUBIO	Visoflex II/ III adapter for Hektor 125 mm; Elmar and Hektor 135 mm in short mounts; TELYT Visoflex lenses	1959-19??	16466
OUCLOO	Visoflex II with 4x 90 magnifier, screw mount	1962-19??	16458
OUEPO	Close-focus adaptor to be used with either the Summicron (II) f= 9 cm 1:2 in ZOOEP/16463 or 16462 adaptor or the 2.8/135 in 16462 adaptor. This usage will yield a 1:4.5 reproduction scale.	1959-19??	16474
OUFRO	Extension ring for 35/50mm M-bayonet lenses with 1:1 ratio	?	16469
OUFRO	Visoflex extension ring for 5 and 3.5 cm lenses	1959-19??	16469
OUTSO	Projection head to fit ground glass screen of Focoslide or Reprovit	1951-19??	16750
OVAFO	Base and 48 x 1 5/8" diameter column for Reprovit I	1951-19??	-
OVURO	Valoy II copy stand with 32 inch column and UWOOS bracket for Focoslide	1960-19??	16701
OZTNO	Cable release addaptor for using screw release on M-camera	1955-19??	14088
OZTOM	Double cable release for M-camera	19??-19??	16491
OZUPO	Visoflex I housing	1951-19??	16484
OZWTO	Double cable release for Visoflex I with time lock screw; early chrome and later black versions	1951-19??	16492
OZWTO-M	Double cable release for Visoflex M-camera with time lock screw; early chrome and later black versions	1951-19??	16491
OZXOM	Visoflex I with 5x chimney eyepiece, bayonet mount	19??-19??	16482
OZXVO	Cable release for Visoflex I for screw cameras only; pneumatic so called "sports release"	1954-19??	16493
OZYXO	Visoflex I with 5x chimney eyepiece, screw mount	19??-19??	16485