shown by the damascus steel barrels this Drilling Cal. 4 and 11,15x65R LK have a low serial number 8960
http://www.wapenhandelwagemakers.nl/shop/product_info.php/cPath/1_23/products_id/292

have not look deeper into this by now but dare to say damascus steel came out of fashion after 1900 because the custumer was asking for nitro proofed guns more and more.