American Standard 735117 Reproduction Color:Bone Toilet Name: TITAN

Toilet Name: TITAN

and both are stamped with the same part number

Lid P/N: 51

Lid P/N: PF9410LID

We are not positive but believe the hole is used for some kind of locking mechanism

American Standard 735117 Reproduction Color:Bone Toilet Name: TITANManufacturer: AMERICAN STANDARD Lid P N: 735117 Lid Size: 19. 625" x 8. 75" Tank P N: 4272 Tank Size: 18. 75 x 8" Toilet Model: DORAL or OAKMONT CHAMPION 4 #2369 This is a reproduction toilet tank lid. These lids are custom designed with sophisticated 3D modeling software and manufactured in North Carolina. It is available as a beautiful sapele wood tank top simply coated with marine grade spar urethane to provide moisture resistance and also