' John, WTLD is definitely not part of the designation – I should have made clear that the positioning of this stamping on the ring, relative to the stamping of its basic designation. So you don't have your date tables any more, but what about the site of manufacture ? Since the bearing was made in this country there are only two possible sites, Luton and Irvine. One or more of these letters should define that, should it not ? '
Hello Gerry,
Would have been made either in the old 1911 factory at Luton (which closed in the late 70s) or the 'new' post-war factory at Sundon Park (on the north side of Luton and still producing spherical roller bearings); just to keep things nice and complicated both were identified as Luton made products. Irvine only made water pump spindles, one high volume taper roller bearing and small deep groove ball bearings.
I'm still scratching my head on the WLTD bit!
/J