Someone sold me a seatpost that he "thought" was a Gipiemme seatpost.

Arrives this in the mail today... not Gipiemme, but the initials "G.P." in a handwritten font (similar to what I redid in photoshop... my camera is not good) are written on the back of the post, the only other words are "27,2" on the side of the post and "BREV" at the front but if there was anything written at the bottom of the post, where it gets inserted in the seat tube, it was erased by many insertions.

Isn't there a (British?) "G.P." who used to make stems, etc? Any info would be great, it's quite hard to make a search on google or this forum for "GP" or "G.P."... Thanks! :)