Matchlocks at auction

[Lead Snowstorm]

Greetings all,

I had been following this auction with interest due to it having a couple of matchlocks, lots 1 and 6:

https://bidlive.bruneauandco.com/auc...itaria-auction

In particular, I am hoping that I might get some education/opinions regarding the very first lot, the "16th century" example. The images are also attached below.

It seems somewhat akin to petronels discussed previously on this site. However, I could not find another example that seemed to match it exactly, most particularly with respect to the stock contours. I also noted a great many of those early examples had tubular rear sights, and was thinking this one might have lost its original sight (hence the depressed area on the top of the barrel behind the current rear sight...hard to tell, but didn't seem to be a maker's mark?). So, I did not bid. Hoping you all can let me know if I passed on a real gem, so I won't make that mistake in the future!