This lens was redesigned completly from its predecsssor,this is a chrome lens with a vulcanite band at the bottom(missing about 25% of the vulcanite band) .The Elmar lens has a 1/4" and 3/8" tripod mounting block .
The Head of this lens unscrews and can be used on a Leica thread (front mount)bellows.
Superb optical quality
Classic Leica construction