i have heard that the model 34 used a serial number with no letter prefix in 1968 only
There are far too many combinations of prime numbers which add up to 6499 to list here. While there are no pairs of primes which add to this number, there are about 20,000 sets of three primes which add up to 6499.Since this is still far too many to list, here are the first few:3 + 5 + 64913 + 23 + 64733 + 47 + 64493 + 107 + 63893 + 137 + 63593 + 167 + 63293 + 173 + 63233 + 179 + 63173 + 197 + 62993 + 227 + 6269