Orphan Walther bolt?

[7mmBRmostly]

I think this is probably a Walther bolt due to the lug at base of the bolt stem quite similar to the Sportmodell 5, and the forged guide on front underside and the boltface somewhat resembling my Sporter's, but I can't find an exact model match. Front of lug also serialed. Stem and knob also resemble some Walthers; can anyone help to confirm?

DSC_0092 by https://www.flickr.com/photos/153105839@N03/, on Flickr
DSC_0095 by https://www.flickr.com/photos/153105839@N03/, on Flickr
DSC_0094 by https://www.flickr.com/photos/153105839@N03/, on Flickr
DSC_0093 by https://www.flickr.com/photos/153105839@N03/, on Flickr

 

[Gillis2]

I have a Walther KK and had several Walthers in my life and I don't think this is a Walther bolt.

Gilbert