Glashütte Original

Hello, Can anyone please tell me what the lug size for the GO Panoretrograph is? I'm guessing it would be the same a the Panograph, but I'm having trouble finding lug information for either models...Would it be 20mm? If anyone also has a clue to what the ... 

. . . but let me get a confirmation on that for you . . . cordially, Art

Art, Thanks in advance for the confirmation!

. . . my unreliable memory - yes, the PRG takes a 19 mm strap! Cordially, Art

great! Thanks for being able to confirm this fact! I guess I should start looking for 19mm straps as this is the only watch in this particular lug size in my collection and no other straps would work with it..