Unfortunately, the stopper has gone missing, but it was only a couple of quid this morning so no great outlay. I'm very ignorant of such things but am thinking probably Perthshire (Scotland) but stand to be corrected, and likely made somewhere in the last 20 years or thereabouts. Whether such things were made with a practicable purpose - such as an ink well - I've no idea, maybe just an ornament.
A tad under 3 inches in height and very little wear.
So, if someone will be kind enough to send me a spare stopper that will be great

Any and all information appreciated. thanks.
sorry pix are a bit naff.