I do not mean to be disagreeable, but, I do not believe the O.P.'s "Model 1896" stamp is a 'restrike'.
FWIW - I believe it to be caused by a New Die or harder strike on the Die. Maybe a Die became damaged or flawed?

(I think, throwing in the Model 1899 carbine 'restrike', just confuses the issue).

It is always a surprise to me how much variation there is in the clarity and depth of U.S. Krag markings.

Some serial numbers are quite clear and others are easily misread, (especially 3's and 8's & 8's and 6's).

Many gentlemen, new to Krag rifles, have read "Model 1896", as "Model 1898". (Quite frankly, that can be what it looks like, a totally understandable mistake).

I have seen other "Model 1896" receivers that look just like the O.P.'s

Attached is a photo of a Model 1896 rifle receiver, in the 64K serial # range, that is lightly struck and quite clear.

Also, attached is a photo of a Model 1896 rifle receiver, in the 81K serial # range, that is deeply struck and more vague. I believe this looks like the O.P.'s.

Possibly, the difference in my two pictured receivers, was caused by either a 'New Die', damage and wear to a Die, or a 'double strike'?

(I don't think this mark is unusual or rare. Likely, it is a typical Krag variation in the course of production).

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