I have the Vada Mercum on lens , I have gotten confused, I am researching a heliar lens I am looking at which nu8ber does one use as the serial number when the only numbers are on the shutter and on the lens ? So which is which !
[The shutter serial number is 742773 and Lens serial number is 3012024. The shutter speeds are from 1 - 1/75; Aperture from f4.5 to 32. ]
I thank you in advance for your help here!