Diana Which Diana is this 27mm seal from?

[Ievgen721]

PA sold me this seal for Diana 6.

 

[marflow 777]

it is use on Diana model 6 pistols it is a filler for the rear cap for timing purposes to get the cap in the right position to put the screw in
they come in 2-2.5-3.0mm in thickness value 5 euros

 

[Ievgen721]

it is use on Diana model 6 pistols it is a filler for the rear cap for timing purposes to get the cap in the right position to put the screw in
they come in 2-2.5-3.0mm in thickness value 5 euros

Thank you very much.