Romney, Hythe & Dymchurch Light Railway 10p definitive, issued in 1977, depicting No. 9 Winston Churchill.
A hard-to-find issue from this railway in Kent, which has issued railway stamps for the conveyance of mail via its trains.
U/M / Unmounted Mint / MNH / Mint Never Hinged.
For the same design but with a 15p overprint, see here.