SUWOO

• Production era - 1935-1935 (Note: image above is labeled 1925 by Westlich; Laney has 1935 - same era as the Oleyo and Oligo)
• Type - Mini-telescope viewfinder for the round-shaped single-shot housings Oleyo and Oligo
• Reference - Pages 14 and 20 of Dennis Laney's Leica 1984 Accessory Guide courtesy of Mike Butkus.