Nice pick up. Tried it on earlier today in Goldsmiths Bluewater than had both bracelet versions in.
Was mightily impressed, considering on paper the dimensions don't work for me, can see this being a good seller and for many a one watch (for those who cannot get a Rolex Sub), actually felt smaller than a newer sub I recently tried on.
Coincidentally was looking at the BB54 on rubber, (as I want this for my BB58) and I cannot fathom why there is such a love in for this one, felt very small and not helped by the smaller crown, also not keen on the bezel hashes - seemed blocky.