Croquet-style wood-shafted putters often date before 1910, when the R&A but not the USGA banned center-shafted clubs. The relatively primitive nature of this unmarked example indicates a pre-1910 date.  The sole is shod with a full brass soleplate, and there is a lead plug on the heel side of the head.  A circular piece of wood has been recessed in place over the lead to hide it from view. 

This putter was not produced by a large clubmaking concern.  Rather, it was hand made, and to a high standard of workmanship.  The 35 3/4” shaft is original, and the sueded leather wrapped grip appears original.  Because this club was hand made, it's highly unlikely that an identical example made by the same maker exists.  Croquet putters were not popular to begin with.