looking at a francotte side x side made bout 1899 with vl and d markings. stock cheeks are checkered very fine checkering,and look original,but the one cheek shows a small circle where a walnut plug was inletted before checkering. walnut plug matches perfectlry and is hard to see without a magnifier glass. is this something done by frabncotte to reinforce stock or was it done prossibly afterwards? no cracks showing behind the receiver tang or any where else. I would appreciate any replies from those here that know francottees. thank you all.