Info needed on Mod.1926 PPD guns

[OldDominion]

Hey ya'll, in the SCSW in the section for the Model1926 3rd model HE (Wolf&Klar) the authors write that around three hundred were shipped for the Houston Police Dept. and marked HPD and #. They also note the a "small number" were shipped to the Providence RI Police Dept. and marked PPD and #. Does anyone here have an educated guess as to how many were shipped to Providence? Thanks, OD.