VERY RARE Leitz Leica Summicron 50mm f/2 FIRST BATCH 920xxx 1951 RADIOACTIVE

Very early and sought-after Summicron from the very first batch (production started with number 920001), Thorium glass element and typical coating, with original front and rear caps. Despite the years and being the first batch, it is in optimal conditions for use and collection. Haze internally and light cleaning marks, old fungus marks on rear coating (see pics 11,12,13,14 & 15), despite this perfect for use (see pics 9 & 10 at f/2 without edition). Mechanical Problem: None, smooth aperture and focus. Pictures of the actual item, what you see, what you get.