I think this is possibly a 14HP Crossley radiator cap.The Dia. is 1-7/8". It has a 20TPI thread.The bakelite part is excellent, the base has a nick to one edge, but it should still screw onto a radiator.I can post this and I accept PayPal.
"The K3 Magnette must rank in the history books as the most famous and successful of all the record breaking MGs. With only 33 examples produced durin..