It was generically referred to as:
Kipp-M, Für XXX LG 11 mm Prisma
BH YYY, Diam 1"/26 mm
Where XXX is an airgun brand, such as HW, Diana, RWS
YYY is the ring HEIGHT:
It is adjustable for windage, and with some judicious shimming, for drop/droop.
I am sorry, I cannot sell you these as they were purchased for my girlfriend's HW97. They followed a very convoluted path to me, as they were sold to Argentina many many years ago, then they were shipped into México two years ago and now they reside here in CT, USA.
As mounts go, EAW is probably the best mount manufacturer in the world, so their products are not inexpensive, but they are well made.
These particular mounts are made for the GERMAN "Pentagon F" market (free sale to anyone over 18), so they are not up to the recoil of 18 ft-lbs + guns. But in moderate/sedate shooters they do perform well.
The recoil lug is a very peculiar device (lost in mine), that is sort of an inverted allen head screw that you screw in and out from the screw end. Not from the head end. I will have to make one for mine and blue it accordingly.
If Lewis has some of them, you would do well to snatch them up, as they are very very rare indeed.
Current production by EAW does not show the one piece mount, but their rings for Anschütz and FWB and HW should also fit Diana airguns. Again and to insist on the point: These mounts are NOT for high powered springers.
HTH
Un Abrazo!
H�ctor