Not looking for something with more ump at all, already bought the .38 JWH last December.
Finally got my hands on it Friday last, but had a busy weekend so no photos yet
(although it will look just like a nice example of the Mk.IV Series 70).
It has the original spur hammer, and no vandalism of the metal at the grip by stippling or hatching as is often seen. Unfortunately the wood has been sanded smooth without removing the gold Colt escutcheons, but replacement grips are readily available.
No longer has the finger-collet barrel-bush though, replaced with a competition barrel bush by the look.

Thanks for the personal info too, Homer. Greatly appreciated. Certainly clears up a few misconceptions I was laboring under!
Email sent.