[R-390] What are the odds?

[Tom Norris]

A while back I posted about a few radios I received from an SK estate  
some time back, here's an update along with a story.  The part about  
the odds are for those

Lets say there were 2 R-390s and a '390A in semi regular use [wild  
guess about two decades ago] by an older ham, then were put into  
storage - along with a semi-gutted "parts" R-390A - when the fellow  
became too ill to use them.

If these radios were to come out of storage --

What are the odds that 3 out of 4 would have a problem of some sort?
What are the odds that 3 out of 4 would have a problem in the *same*  
deck?
What are the odds of that problem being of the sort that would  
require the
radio to be pretty much completely disassembled?

Question --
Which radio is working, worked off the bat with no major module repair
needed, and is working to this day?

Murphy's laws of infinite probability apply.

Tom NU4G

It's a boring afternoon and I wanted to post something.