Photo attached!

- Radial tyre vs crossply.jpg (158.59 KiB) Viewed 3816 times
I gave up for now & bought a pair of 525.550 Avons (made in UK)..not cheap at £140 +VAT delivered from Vintage tyres. They will go on the front & the existing very good- not hard- condition (but age unknown) on the back.
Never mind. It was worth the try!