From Leica Wiki (English)
- Production era - 1956-
- Type - Double trigger hood for 3.5 cm Summaron and 5 cm Summicron with narrow chrome band and velvet lining for reverse positioning
- Variants - Narrow band (early); wide band (late)
- Reference - Page 106 of Dennis Laney's Leica 1984 Accessory Guide courtesy of Mike Butkus.
- Forum discussion