Picture and Parts List Supplied by Terry Kulchycki

From a 1935 Durant Parts Catalog, the following is listed:
 Part Number  Name & Description  For Models  Price
 26145  Gas Tank Cap - aluminum, for tank on rear  C,F,M,M2,R,S3,T  .20
 20112  Gas Tank Cap - die cast, threaded for tank under seat  C,CC,L,M,M2,X,401  .25
 26316  Gas Tank Cap - Bakelite, threaded with "D" monogram  M,M2,M4,40,55,60,63,75  .25
 26789  Gas Tank Cap - black  60,63,66,70,614  .25
 27710  Gas Tank Cap - black  406,407,610,612,615,616,617,619  .25