All steel Scottish flintlock pistol in auction.

[magicesperanto]

I think you could be correct, check the pics on this page:http://myarmoury.com/talk/viewtopic.18742.html

[enfield2band]

The 18th century style description seems like it may be a copy of an original rather than a reproduction which would have proof marks.
The estimate also is very low for something like this. The price of an original would make your eyes water!