Zeiss Super Ikonta 530-15 from 1932

This is rangefinder camera from 1932 according to the lens serial number. 1 449 857.

No other serial number in the body was found

I nice Carl Zeiss  Tessar lens 12cm 4.5

Slow speeds untill 1/5 are not working but once  we reach hight speeds, shutter starts work  like a clock.

Includes a film plate to transform 6 1/2 x11 cm  to 5x6/1/2.
According to Zeiss books this is a 170.1.15  Type 2 from a total of 3 types

Some indications inside film door "SPEZIAL ???   ???? " and "?AT? 5856 ???"
Looking for more infomations concerning this notes