Gottlieb rubber part numbers and sizes
Rings: A-10217 3/8", A-17493 7/16", A-10218 3/4", A-10219 1", A-10220 1-1/2", A-10221 2", A-10222 2-1/2", A-10223 3", A-10224 3-1/2", A-10225 4", A-10226 5". Mini posts: A-14793 23/64" and A-15705 27/64". Flippers: A-13149 2" flat beaded red (small flipper), A-13151 3" red. Others: E-15 tip, 986 drop target grommet, 1872 plunger tip, 2752 chime grommet, A-1344 rebound, A-5240 grommet.
Systems
Related tips
Source: Gottlieb System 1 Pinball Repair from 1977 to 1980, Clay Harrell (pinrepair.com)