Quote Originally Posted by Sirius Glass View Post
To determine the date take the first two letters of the serial number and use:

ES ==> 1990
SH ==> 2002

Hi Steve, Thanks for your advice, I am aware of the the Victor Hasselblad dating code, but should have added that the viewfinder in question is not in my possession and I can't check the serial number.
I was looking for some general information to determine the year this particular model of 90 degree viewfinder was first available. Any clues most welcome.
Thanks again