early hi-top, help please

[coppinpr]

can anyone tell me (a) is this an early Mills Jewell? and (b) if so is the coin entry mech that is in place in stead of an escalator original, a mills option, or just a lashup, (there are good photos of this area)

http://www.ebay.co.uk/itm/VINTAGE-MILLS ... 500wt_1413