I've got an extra set of Silver1 cranks, set up as a Wide/Low double with guard. They are 173mm arms. Mine may be special because it may be the heaviest set up possible. The 38T Ring is a Rivendell Silver in STEEL. That ring came on my HubbuHubbuH tandem as a timing ring. It's a porker but it may also outlive all of us. The 24 ring is a steel Sugino. The guard I made in my shop out of a 42T Race Face narrow/wide chainring. So it's unique but totally rider-worthy. I had this crankset most recently on my RoadUno, with a front derailleur and a single freewheel. The front shifting was perfecto, so there's nothing about this Silver Timing ring that makes it unsuitable for any of your derailleur setups.
The Rivendell Silver1 38/24 with guard retails for $280, and everything secondhand should be half retail, so I'm asking $140 plus shipping. Local pickup is free!
I'm also throwing in a nearly new UN-300 sealed bottom bracket. It's 110mm and that's what I was running on my RoadUno.
If you don't want the rings, then the arms with crank bolts (but no chainring bolts) at half-retail is $95 plus shipping. You can still have the free UN300 BB if you want it.
Bill Lindsay
El Cerrito, CA