Shimano Deore XT BR-M734 cantilever brakes.Complete set - front and rear, complete with Shimano Deore XT brake pads, springs and bolts.
Bought from eBay and not quite as sparkly as I had hoped. £40, plus post.
Thanks for the advice @bikeworkshop having looked into the cost of re-chroming or nickel plating, I'll be looking at paint options, hence the question, as I want to advise them appropriately! Makes sense that the area would be best left 'au natural'