Being embossed crowntops they gotta be before Prohibition which would be roughly pre 1919 depending on what state your in as that date varied state to state. rough estimate 1900-1919. figure any tooled blown in mold crown top the earlier 1900's while the ABM most likely later like 1905 to later. Blown in mold tooled tops are not always older then ABM. Just my opinion. others may vary. LEON.