Parts ID.

Oky, I have acquired a couple of parts that look interesting. The bolt I have discovered is a German Sauer & Sohn replacement. The safety has me baffled. Has anyone an idea of what the T.I 90 refers to? Appears to be like new and well made with clean forging strikes.

Attachment 2452

p.s. Whats the meaning of the two funky stylized eagles on the bolt? Proof marks? Trade mark stamp?

Thanks up front, ZB.

T.I. = TONG INDUSTRIES. Korean. pretty sure its an M14 safety (although interchangeable)