C-H,

The 16A one in front of me - made in South Africa with a South African Bureau of Standards (SABS) mark on it has slightly longer live and neutral pins - just shorter than 21 mm. I never realised before that they were exactly an inch apart!. The earth pin is slightly thinner at 8.6 mm.

If you want one for your collection C-H, email me an address off list and I’ll send you one. I’ve got a few here and they’re not that much use to me in NEMA land!