One rebarrel company
https://www.doublegunshop.com/forums...&Number=631801
Could you please post a full size in focus image of the barrel flats, and just forward of the flats. There should be a date code.
or send it to me as an attachment (not buried in the text) to
drewhausemd@yahoo.com
I've not seen replacement barrels marked "Herstal Belgium" or "Nitro Steel"