Jim, thanks for your reply, but the Dublin&London pipes I am puzzled by were still available at the shops back in 1992 when I bought a 264. They had the MADE IN THE REPUBLIC OF IRELAND (in three lines)COM and seem to be similar to the Kildares.
Last year I bought in eBay an unusued one (a 150) with original acryilic mouthpiece in dark amber colour ???
And I have also a 265 MADE IN IRELAND and a 14 shaped one without COM. All of them have the Peterson's in block letters and the forked P with the closed upper part. I was supposing it was a series name, not a factory identifier.