« Reply #1 on: March 15, 2019, 05:31:37 AM »
I went through my copy of Cold War Pistols of Czechoslovakia, Chapter V: The vz. 82 and CZ 83 and didn't find anything about a letter preceding the serial number, even in the "odd" sequence/year mismatches.
Would you be able to post a photo showing the markings?
Per page 117, the "calculated" serial number range for those with "89" year markings is 110241-153294.
The "observed" serial number range for the "89" year markings is 110305-147468.

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CZ24/27/38/40P/45/52, Vzor 50/70,75BΩ,75D Compact,P01/07/09,P10M/S/C/F(9mm,.45), Phantom,SP01 Tactical,Shadow 2 (Blue,Urban Gray), 82/83/85 PreB, 97BE,97BD,97BDE,100,1911A1, 2075D RAMI,452 American,550 Urban Counter Sniper,805 Bren S1,Drake G2,Duo,Z,vz24 8mm Mauser,FK 7.5 BRNO Field Pistol, PSD