Hi Malc,
Are there any signs of gilt whatsoever that aren't particularly clear in the scan? Usually there's always some of the original plating remaining in the deeper creavases and indents etc. where its literally impossible to get rubbed off (there doesn't appear to be much surface wear at all as the detail is very crisp indeed), so if you can't see any signs of guilding at all I'd say it was probably never there to start with. However those blades do look nice and old and comtempoary with the badge... hard call to make.
all the best
,
Luke