Gus,
I would guess it would work if you can mount it without too much modifications. If you have to relocate the screw hole be very careful where that screw hole is going to come out on the face of the Bess lock. You do not want to destroy some nice markings on an original lock. You have to make sure that there is sufficient contact on the tumbler toe throughout the cycle. You certainly do not want a spring popping off the toe at the bottom and tearing out your lock mortise. Make sure the spring does not contact the bolster at full cock preventing a complete cycle. Mounting pin holes are not hard to plug and relocate, but they must be correctly located for the spring you are using. It is one of those things that can be done, but there are pitfalls to be aware of...you know the kind of things that increases your vocabulary...
