Great find and question ...
I don't know, but I'd guess it would be whatever the market would bear, particularly if someone needed a set to repair an otherwise unusable scope on a matched No.4(T).
Given how much we have tied up in No.4(T)'s in ~Angel~'s collection, personally I'd pay at least $500/set and perhaps much higher, if I had a crappy scope right now, which we don't. We already had Peter Laidler(through Brian Dick
at BDL
) already fix up all of the ones she had that needed overhaul, plus an L42A1.
I may be way off, but I bet an original set auctioned on eBay would go through the roof on bidding.
I'd love to hear Peter's and Brian's take on what this particular component set would sell for.
Regards,
Badger