From the second to last photo it sort of looks off face, doesn't it?
I have some additional pictures I requested, and I believe from them and ones of the other side, that what you see is the extreme side lighting causing a shadow line of the barrel block overhanging the action to a slight extent.
One reason I bought the gun was that it was a 10 gauge. I have an 1872 high frade Scott 8 gauge that looks, in design, similar to this one and a 12 gauge Birmingham gun of the 1890's also of similar design. I was a little puzzled by the gauge. My little bit of research before I bought it indicated that the Belgium maker also had sales offices in Paris and England. I have really seen very few 10 guage shotguns by French makers, which had led me to believe there was little demand for the larger gauges on the continent. I found it odd that a heavy 10 gauge would have been made and marked specifically for that market.
