1925 corresponds to TAF REISH PEY HEY (5685) or TAF REISH PEY VAV (5686). Depending if he was born between Teves and Rosh Hashana or after Rosh Hashana will let you know the hebrew year.
I’m trying to work out what HEBREW year the Rav was born, if i know the month he was born, it would be easy to work it out- via hebrew date conveter. It depends if he was born before R”H or not…