Here's a curious and to me inexplicable thing

https://www.ebay.com/itm/Millitary-1...temCondition=4

I would have taken it for an ordinary leather & seal civilian Day Dress sporran, on which some Gordons veteran had stuck a Gordon Highlanders sporran badge. I've seen loads of civilian sporrans with military badges attached aftermarket.

But no! It has the Broad Arrow stamp!

So now my best guess would be that the seal front was added later, when the veteran continued to use the sporran in his civilian attire. I'll stick with that until somebody shows me a photo of Gordon Highlanders wearing sealskin-front sporrans.