Does anyone know the approximate age of a pint bottle, 7 inches tall, wire ring around top with wire handle, Embossed with NEMO, KORN SYRUP, NEW ENGLAND, MAPLE SYRUP CO.. BOSTON? Resembles the round milk bottle appearence in shape. The number "4" on the bottom. Clear turning of age with purple tint. Hubby thinks it's the turn of the century bottle.