The Broadway Model 57 grade was introduced only in 7J KWKS versions around 1875-1876. The Broadway was probably Robbins' response to the cheap unjeweled watches beginning to appear on the market at the time. This grade did become quite popular. Although the Broadway does not appear to be any "cheaper" than a 7J KWKS Home (per this 1876 example), this grade bore the distinctive A.W.Co. Waltham signature perhaps because by then the Home was selling well.
The last Model 57 watches made were probably Broadway S/Ns 1122001 - 1124000 (Oct - Dec '78) as seems to be indicated by listings in the Serial Number Ledger.
