Posted by Adrian R2 on 05/10/2021 15:49:07:
I don't recognise it but dimensions may help, particularly width of bed and height to centre.
Dimensions are approx. 92mm from the bottom to the centre and the widest part of the dovetail is also approx. 92mm
I have an idea of what it fits but I don't want to influence anyones thinking. 
Edited By Hollowpoint on 05/10/2021 16:27:38