Sometimes you get lucky:
For awhile I have wanted to try one of those folding peep sights for the Mauser cocking piece, an improvement on open sights but without the bulk of a scope. I found a Lyman, priced right and in excellent condition, complete with cocking piece and put it away in my parts bin waiting for the right Mauser to show up. I thought I would use it someday but only after some serious fitting. Then I compared it to the cocking piece on my 8mm Brno fullstock, and it seemed an exact match. So I popped it in. That took about 5 minutes. And it worked perfectly. I can detect no difference in trigger weight, overtravel, etc. It was a perfect fit.
Now, if it would only warm up a bit, I could take it out for a range test and set the front sight height.
(BRNO small ring Mauser 98. Caliber 8x57S
Barrel Length: 20.5" to front of bolt. Double set triggers.
Hensoldt-Wetzlar 6x scope in claw mounts. German No. 1 reticle.
Leather scope case. Dated 1951 on barrel and receiver.
Matching serial numbers on barrel, bolt and stock.
Czechoslovakian and German (Ulm) proofmarks.
Right side of barrel ahead of rear sight marked in English "Made in Czechoslovakia".
Receiver and barrel stamped "Geco" (German retailer, Gustav Genschow & Co.)
Stock stamped WB (inspector) in a cartouche on bottom of stock behind the pistol grip.
Tally marked stock (silver inlays of Roe Deer, Wild Boar, Red Deer, and Fox...w/silver pins)
Weight approx. 6.5 lb. w/o scope.)