It is a Rotol designed blade.
The RS indicates Jablo wood with Rotoloid covering and a brass leading edge sheath.
The RA100167 is a blade design used on the Seafire Mk 15 & Mk 17 (and maybe other Marks). The RS mentioned above was usually used as a suffix (ie RA100167RS) but it looks like they ran out of room or could not get a good stamping.
The JP in JP143148 indicates Jablo Propeller Ltd, a propeller manufacturing company which was owned by Rotol. The 143148 could be the Jablo Propeller Ltd internal blade design number, but this is just a guess. It may be a batch number.
The PP A54262 may be the production batch number.
The four 6-digit numbers in the pink circle (pink for Jablo Propeller Ltd) on the side of the blade are the S/Ns of the different blades indicating a 4-blade propeller. The number 060850 is the S/N for this particular blade as it is duplicated on the bottom of the blade.