vintage (antique? classic? old?) golf club question

I could have sworn I asked this here before, but (a.) I couldn’t find it in a search (and don’t remember the answer even if I did ask it years ago), and (b.) while cleaning the basement, I just came across the golf club in question once again.

It’s an old, beat-up Spalding “Bobby Jones” model that is part of a set I got at a tag sale years ago. The shaft is steel, but is covered with a fake wood-looking laminate-type covering. I’m guessing it’s from the 1940’s or so. I know the club is worth nothing because it’s so well used, but that’s not the question I have. On the sole of the club, where there is usually a number listed (a digit “9” for my namesake club, for example), there are the letters “RU.” What on earth might this stand for? One person I asked thought it might be “rescue utility,” but I somehow doubt this–it seems too modern a term somehow.

Any old golf club experts (that’s “experts on old golf clubs,” not “golf club experts who are old”) out there have any idea? Thanks!

http://www.homestead.com/vintagegolfhouse/clubs.html

$25. “Run Up”

Great. Thanks!

(“Run Up”… a chipper-type club, I’d guess.)

I love the old names for golf clubs (largely thanks to P.G. Wodehouse’s golf stories I suspect) - “mashie”; “niblick”; “brassie”; “cleek” - much nicer than 2-Iron, 3-Wood, et al

I think I just like saying the words. :smiley:

Grim