A Chapin Discount sheet from that date mentions the "J. Pearce." mark in connection with Chapins' "common bench planes." The numbering system for this part of their line was:
100 Smoothing plane, single iron
101 Jack plane, single iron
102 Fore [try] plane, single iron
103 Jointer plane, single iron
108 Smoothing plane, double iron
109 Jack plane, double iron
110 Fore [try] plane, double iron
111 Jointer plane, double iron
The 1925 price list has the same numbering system for their common bench planes, but gives no indication of the J. Pearce mark.
In any event, your plane's iron seems to have the Chapin-Stephens mark, which, if original, (and I suspect it is), then your plane post-dates 1901 when the two firms were combined. So, possible dates for it would be 1901 to 1929, when Stanley bought the firm out and discontinued the wooden plane portion of the business.