This vintage Leica 16472 OTSRO Visoflex bellows extension tube is for use with the 135mm f/4.5 Elmar lens. There are a couple of light scuffs on its exterior. Please see photos.
Leica
Schneider Kreuznach
Schneider Kreuznach
Sears
Leica
Pentax
Leica
Leica