From very distant memory..........
All in Kgs.
MODEL LH CENTER RH TOTAL
1 4270 4070 4270 12610
2 4270 5400 4270 13940
3 4270 6900 4270 15440
1 737-200 Non adv 2 bagged ctr bays
2 737-200 Non adv 3 bagged ctr bays
3 737-200 Adv 3 integral ctr bays
I believe 737-100/200 isn't regarded as a "classic"
Hope this is of some help, the airplane weight & balance manual should provide exact answer.