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	1960-19??	16505
NOOBU	Film viewer without indicator punch	1951-19??	-
NOOKY	Close focus accessory with parallax for rangefinder Elmar (I) f= 5 cm 1:3.5 lens	1935-?	16500
NOOKY-HESSUM	Close focus accessory with parallax for Hektor f= 5 cm 1:2.5 or Summar f= 5 cm 1:2 lens	ca.1935-1949	-
			-
OAGNO	80-1	19??-19??	-
OAFOO	80-1	19??-19??	-
OCEGO	Leica Ig	1957-1963	-
OCLOM	49	19??-19??	-
ODULO	46	19??-19??	-
OEFGO	Leica If	1952-1957	-
OEGIO	Leica Ic	1949-1952	-
OEUPO	50	19??-19??	-
OHIKO	37	19??-19??	-
OHIKO-M	37	19??-19??	-
OHTEO	38-9	19??-19??	-
OHUGO	101	19??-19??	-
OHVIO	101	19??-19??	-
OHWLO	101	19??-19??	-
OIASO	37	19??-19??	-
OIDYO	16-38	19??-19??	-
OIFCO	38	19??-19??	-
OIGEO	38	19??-19??	-
OIMPO	37	19??-19??	-
OIPVO	38	19??-19??	-
OIRZO-M	38	19??-19??	-
OIRZO-S	38	19??-19??	-
OISBO	37	19??-19??	-
OIVHO	38	19??-19??	-
OIWKO	?	19??-19??	-
OIXMO	?	19??-19??	-
OIZQO	?	19??-19??	-
OKARO	18	19??-19??	-
OKBZO	19	19??-19??	-
OKLMO	68	19??-19??	-
OKVCO	19	19??-19??	-
OKYNO	68-9	19??-19??	-
OKZPO	67	19??-19??	-
OLEYO	20-1	19??-19??	-
OLIGO	20	19??-19??	-
OLLUX	Hood for 35mm f/1.4 Summilux I	1961-?	-
OLORA	20	19??-19??	-
OMAPO	41	19??-19??	-
OMEXO	78-9	19??-19??	-
OMIFO	41	19??-19??	-
ONLIO	67-78-9	19??-19??	-
OOBAZ	55-6-60	19??-19??	-
OOEUK	72-3	19??-19??	-
OOEVM	72-3	19??-19??	-
OOFRC	87	19??-19??	-
OOGAN	60	19??-19??	-
OOGIT	?	19??-19??	-
OOGUM	?	19??-19??	-
OOMAP	?	19??-19??	-
OOMEX	?	19??-19??	-
OOMYL	?	19??-19??	-
OORES	54-56-68-74	19??-19??	-
OOTGU	55-6-60	19??-19??	-
OOZAB	55-6-59-78	19??-19??	-
OOZAB-G	55	19??-19??	-
OOZEG	67-78	19??-19??	-
OOZIS	75	19??-19??	-
OOZKU	75	19??-19??	-
OOZMY	59	19??-19??	-
OPDUR	80	19??-19??	-
OPFAS	80	19??-19??	-
OPKOM	59-0-78=80	19??-19??	-
OPRTO	19	19??-19??	-
OPRYL	80	19??-19??	-
OPSVO	19	19??-19??	-
OQZIO	19	19??-19??	-
ORAKO	18	19??-19??	-
ORBMO	19	19??-19??	-
ORLEO	19	19??-19??	-
ORESO	65	19??-19??	-
ORMGO	19	19??-19??	-
OROLF	110	19??-19??	-
ORQPO	108-9	19??-19??	-
ORTOX	19	19??-19??	-
ORTUX	19	19??-19??	-
ORTVO	110	19??-19??	-
ORUXO	19	19??-19??	-
ORWYB	19	19??-19??	-
ORYCE	19	19??-19??	-
ORYFO	110	19??-19??	-
OSBLO	110	19??-19??	-
OSERO	19	19??-19??	-
OTDYM	49	19??-19??	-
OTEMO	37	19??-19??	-
OTPRO	1:1.25 magnification accessory for OTZFO focusing mount used with Visoflez II/ III	?	16471
OTQNO	49-0	19??-19??	-
OTRPO	49-0	19??-19??	-
OTSRO	Adapter for use of 13.5 cm Hector lens with OTZFO focusing mount used with Visoflez II/ III	?	-
OTVXO	49	19??-19??	-
OTXBO	49	19??-19??	-
OTYDO	49	19??-19??	-
OTZFO	Focusing mount for Visoflex II/ III for use with 65mm Elmar, 90mm Elmarit and 135mm Elmar lenses	?	16464
OUAGO	49-0	19??-19??	-
OUBIO	Visoflex II/ III adapter for TELYT lenses	?	16466
OUCLOO	49	19??-19??	-
OUEPO	Close-focus adaptor to be used with either the 2/90 in ZOOEP/16463 or 16462 adaptor or the 2.8/135 in 16462 adaptor. This usage will yield a 1:4.5 reproduction scale.	?	16474
OUFRO	Extension ring for 35/50mm M-bayonet lenses with 1:1 ratio	?	16469
OUFRO	49-0	19??-19??	-
OUTSO	63-78	19??-19??	-
OVAFO	67-78	19??-19??	-
OVURO	67	19??-19??	-
OZTNO	88	19??-19??	-
OZTOM	47	19??-19??	-
OZUPO	47	19??-19??	-
OZWTO	47-88	19??-19??	-
OZWTO-M	88	19??-19??	-
OZXOM	47	19??-19??	-
OZXVO	88	19??-19??	-
OZYXO	47	19??-19??	-