The PH480, 490 and 492 all use the same set of four belts. I confirmed this by looking up the belt part numbers in the 480 and 490 service manuals and punching them in
here. I couldn't find the 492 service manual but Teddy Hashee's restoration video
here lists the same four belts in the description as the 480 and 490. I linked the two sets of codes to Marvac or Turntableneedles if you want to use one of them.
Counter:
SCY7.0 /
SBO7.0
Drive:
FRW9.2 /
FBS9.2
Auto Shut-off:
SCQ4.8 /
SBM4.8
Wind:
SCB3.8 /
SBX3.7