Just to confirm. The Discharge number R506075 would have been unique to him even if he was rejoining?
From what I have seen, these records aren’t available online but I could access them by going to the National Archive or Southampton Archive, or by ordering copies? Is that correct? Some of the records are available on findmypast as you mentioned before but my question is for those that aren’t on that search website.
Yes Maria
A far as I am aware in most all cases that would be his unique Number issued to him on Joining.
Possibly in very rare cases there mat have been a different Number issued but that I stand corrected on.
Only the Seamans Pouches BT372 (Most that is) are available Online Maria and also in some cases are the BT382 but have found that the latter are hard come by online too mush work for them at the NA ,but cannot blame them as there are so many requests .
Wish you all the luck in your researching futher into all this!
Cheers
PS Always also remember that there could be two seamen with the same discharge number but one will have a prefix depending on what year he joined the service so don't look for a Number without a Prefix as your has the R
cHEERS