Hi John,
From the description " slanted air-chamber signed 'MODEL DE LUXE, MANUFACTURED ABROAD SPECIALLY FOR R.J. ADGEY BELFAST' " ...slightly ambiguous but from that you could assume it is the airchamber that is marked for Adgey?...although I agree that it is usually the barrel that carries the 'Model De Lux' and 'Manufactured Abroad', or indeed, 'Made in Belgium' stampings. This one would date from 1920-30...sometime then anyways as it carries the circled "M" marker in the stock.
Hi Brian,
Sadly this auction is just too far away for me to attend. I may have a sneaky online bid, not sure yet...but even winning on the low estimate of £80 it would effectively cost around £130-£140 by the time it got to me (assuming 20% commission, vat and posatge/packing, which is around £28 from Holts) ...which seems a bit too much for a painted gun!...I do like these old JM gems but have got to be realistic about these things......pah!