More Argentine Perfins

Any help identifying these Argentine perfins appreciated in advance.

BE on a 1923, red, 5c San Martín (no dot after value)
FyP on a 1935, red, 10c Rivadavia
JBI on a 1935, buff, 1c Sarmiento
all three perfins are inverted.

During the early decades there was a Federal-Provincial bank (Banco
Federal y Provincial) operating in the major cities. FyP instantly
brought that to mind. However, all "bank" perfins I have seen to this
date (in other people's collections, I regret) have had Bco. perfinned
on the first line and whatever else on the second. My FyP does not.
--
Tony Vella
Ottawa, Ontario, Canada
http://www.amedialuz.ca/