Introduced in May, 1875, the Crescent Park and Martyn Square grades appear to have been made for export. Their style of engravings, balance cock (with hairspring stud and wider base), and curved barrel bridge look like a cross with the Model 70 perhaps to be more acceptable to the English market.
The balance cock and barrel bridge on these export Model 57 watches are not listed in the "Waltham" 1885 Materials catalog. Perhaps these grades should not be called Model 57s, but they share most of the same parts, including the 4-pillar plates. The 15J Crescent Park is a better grade than the Martyn Square and few were made. Many Martyn Squares were made, mostly 7J and 2-pair 11J versions, and often show up in England (another successful Robbins experiment).
Note the S-shaped barrel bridge and studded hairspring on this exhibited 1875 watch. Also the plate jewels are smaller than on the standard Model 57 (the settings are fake). The plain porcelain dial has sunk seconds and Roman numerals. The OF "half hunter" silver case, serial # 87675, was made by Aaron Dennison at his watch case company in England.
