that bolt seems to be a German Gew. 98 bolt WW1 or before, due to the 'Prussian Eagle' proof mark on the bolt underside.
The other stamp on the bolt underside, i can't identify. Looks like 'something in a circle, under a crown'. This should be an Inspection mark, with a Fraktur letter in the circle. That looks uncommon, i've never seen that stamp before
-> that bolt might be interesting for Gew. 98 specialists...
Typical Gew 98 bolt. The bottom of the bolt root bears Imperial era inspection and the bolt firing proof, the marks on the back of the bolt root are manufacturer marks, and the top flat has been scrubbed of its serial number