I've just happened across this excellent post:
http://www.classicapa.com/viewtopic.php?f=2&t=590 with great photos of the prewar pistols, and showing the reduced diam' at the breech end of a mk1 barrel, compared to the MK2 Target barrel, as John describes.
I take it the MK2 Target's barrel receiving block is therefore machined a little wider in it's slot to accomodate the non-reduced MK2 Target barrel?
Therefore a MK1 barrel could well be a bit 'sloppy' in the MK2 barrel slot? And would always look conspicuous to the experienced eye
So, am I right in thinking that there were
no later barrels (with grooved hand grip, and even later knurled ones) that have the extended forward length in the MK1/2 style?
Because if there were, and if the fittings were in the right place, it might be a simple job to machine off the raised groove/knurled area, to make an older 'looking' barrel
I'd think Mick, if you do have to go with a short-nosed knurled-grip barrel, it might at least be worth having it straightened and machined parallel then blued? And maybe even have a short front extension section brazed on nice and tight to the pivot/foresight strap!?
No expertise here, just some thoughts - Phil