You're the man for them, pearow. Glad you can make use of them. They are a pretty classic "vintage" styling cue, but to me they are also very savy as a grip/seat design on any spinning rod of any light to midweight. One of the best all around anglers I know gave me a UL spinning rod he made--all because I gave him a shotgun for behind the seat of his truck and told him I wanted nothing in return. I have to admit I was a bit disappointed he didn't use sliding bands, but I have caught a lot of bass and crappie with it. If he hadn't made it specially for me, I'd have changed the grip long ago to use those little St. Croix bands. The rod was junk but the bands are good.
Gathering up the stuff for pearow, I picked up my Herter's UL 'glass, which I built about 1970. Trout, bass, then crappies for many years and one or two guide changes. It spent 35 years with an Alcedo Micron, which I sold a few years ago. Along the way it became my mackerel rod. I didn't break any state laws by rinsing it off after use in salt water, either. Well, you can see the reel seat must have a pretty good quality finish as it is in good shape. The cork was glued up with Herter's powdered Weldwood-type glue, and that is all sound, too. I photoed it to show the other type sliding spinning reel seat I like. I think Phillipson had one similar. For all I know, something similar is still sold. I quick turned down the grip this morning to show the full range of placement you could get with these seats according to the length and contour of the grip. You could mount them either direction on the grip (or even use a press on-off butt cap so you could slide the seat off and turn it around). I like them with the screw-lock ring up under the forefingers. To me, these or simple bands always seemed the best for fly/spin combos as opposed to the multiple seat rigs provided on some of that type. I built up a 6' yellow Fenwick fly-rod blank that way--the one I just took a set of bands off--and used it in the '70s with a Pflueger 1494 and the Alcedo.