1. No refernce number may not be a big issue but I would be more comfortable- not a deal breaker,
2. If case has been polished inside stamps should not be affected.
3. I do not think it is a fake but possibly the case back was remade if over polished in the past ( rest of case is not over polished). The "soft " stamping is a concern but I am not sure
4. I have asked the vendor to get an extract
5. Never dealt with the vendor before but I have got good references for him
6. I know John well and hope he does respond to this post. I think he is in NYC for Christies auction
Thanks again for all your input
I will keep you informed
Julian