Greg, if you're thinking of a whittler with a wharncliffe main, like the 57 Geppetto, with a small lambsfoot, I agree, that would be an excellent variant.
Add the 'swoopy' little secondary clip shape from the early 25 watch pocket Barlows and that would be a pattern I could really get behind!
As a talented whittler who obviously spends a bit of time using different blade shapes, and modifying existing ones to your liking, I'm interested in what you find most useful about about the lambsfoot over a coping or sheepsfoot blade?
I'm guessing that tapered profile towards the tip might allow you to turn the blade more nimbly in tight cuts?
Jack, I'm really looking forward to hearing what your enquiries will turn up. It would be fascinating to hear their thoughts on the purpose and origins of the lambsfoot as distinct from the sheepfoot, too. I have a theory, but I'll hang onto it for the moment...
Here's another jack with lambsfoot secondary for you Guardians to consider.
This one is especially interesting to me as, although it's doubtless Sheffield made, it could make a claim to be an Australian traditional pattern.
It is a specialist veterinary knife, which also features a main blade shape which has fallen out of use: the "Baker's Sweep."
As Jack has noted, Australia was a big market for Sheffield bladeware, even more so after the US started to protect its local cutlery industry with trade tariffs, and this is an example of a pattern which was specifically designed for the needs of that market.
It's a pretty nice design, I must say. You all know how useful the lambsfoot is, and that needle-like point and eponymous sweeping belly of the main blade offer a very versatile blade combination. I daresay those tweezers and that pick would have been very well made, too.
Sadly, I've never seen one either in a museum or a private knife collection...