CAPKOO,
Glad it's a .22 eh? I read your other post on the Yellow Forum.
I like that caliber on that powerplant too! My old Hy-Score 801 is a .22 also and in spite of the abuse it's former owner ('s ?) gave it, the Seal and Mainspring are still in great shape ans it's plesantlly powerfull!
I can't vouch for the exact date on my 801 as it oddly dosen't bear the usual left rear Diana reciever mark, instead the bottom of the pistol grip bears a stamp of "1 8 6". I'm guessing the 6 refers to 1966 making it 38 years old.
ZVP