From Leica Wiki (English)
- Code name - ITOOY - 12580
- Production era - 1955-1966
- Type - Hood for 5 cm Elmar with E39 front flange (also fits Elmar (III) 1:4 / 90mm per discussion  #4 below)
- Variants - Early version engraved "Elmar-"; late version with wide chrome band with Ernst Leitz GmbH Wetzlar | Germany (on side not shown)
- Reference - Page 106 of Dennis Laney's Leica 1984 Accessory Guide courtesy of Mike Butkus.
- Forum discussion