Thank you, CaSam.

So yours is the Volvo, obviously. 16 x what?

I now have a quotation from Bruntons for a Varifold 2-blade and they are suggesting 2 blade Varifold 15” x 10”. £800 + VAT + shipping, which is probably a good price and, I suspect, less than the Volvo. There is a testimonial on their site from someone with a B32 who reckons that the 15×10 Varifold is a good match.

In the photo of your shiny new Volvo prop there is clearly no antifouling of any kind. Are you using it just highly-polished, with no antifouling?

Thanks for your help.