X…452 (M) comes up in a search…bottom of first page. X452 is the Dunlop/MWS part number for a 4-1/2" x 15" - 60 spoke wire wheel as used for heavy duty MG TF/MGA /Austin Healey etc. https://www.mgexp.com/forum/t-serie...ire-wheel-stuff-like-unsprung-weight.4298250/ Patrick
The above and the OP wheels are very close, but don't appear to be identical. Possibly same car but different year?