Charlie
Pack it, insure it and send it. Get it refurbished before he decides that he has done his last.
Whilst the cost you incur, may or may not result in an $ for $ increase in the value of your scope, it will give you a scope "that is good for another 60 years".
Having had several scopes refurbished, the difference between before and after, justifies the expense.
Sending your scope to BDLshould ensure that all necessary US permits required to export a scope for repairs are professionally met.
Paul