Here's a Zeiss 436/1 reversible tube finder with case. Serial number: 1780, made in the early 30's for use with Contax I. This is the first black/nickel version. On the right-hand side there's a rare Chinese engraving: "Made in Germany", that signifies that it was exported to China. Good condition, with signs of moderate use, some edge wear to the black painted parts. Optics has haze and dust inside. Please have a look at my other auctions for more items, - I’d happilycombine shippin...g costs. Good luck!