These shoes have to be more than 15 years old. Â Maxwell used to have the premises near Gieves & Hawkes (but not quite on Savile Row) in the late 90s, and before that, was operating underneath Huntsman. Â The New Bond Street address must have been before that.
It must be an awful long time ago that Messrs. Maxwell had premises on Bond Street (late 60s I would guess). Prior to their current owner Foster, they were in Vigo Street, South Audley Street, Savile Row and, I believe, Dover Street. With every change of address they had a change of ownership. The Bond Street address must have been right opposite Asprey's.
It's pointless to purchase bespoke apparel made for someone else's physical measurements, and it's downright dangerous to wear shoes made for someone else's feet.
There is a long tradition here in England (and elsewhere, I presume) for sons to continue wearing their fathers' bespoke footwear. Just like other shoes, they will mould to your own foot. I would have no hesitation to buy second hand bespoke shoes if I could try them on; I definitely would not pay high prices on eBay. There might be significant differences between the left and the right shoe. But if the shoes fit reasonably well to start with, why not continue wearing them?