The SS80 was a spotter so it never had a finder. Since it shared the same focuser with other models there should be 4 mounting holes under the glued on flat on the top of the focuser so an adaptor is not necessary if using an old style Vixen finder base.
They had two different styles that used the same 4 bolt pattern
An alternate solution would be to buy a finder dovetail shoe and mount it to the flat spot.
Something like this one:
https://www.ebay.com...C34SB3D5NEFB2AE
Edited by Kasmos, 05 July 2024 - 04:07 PM.