This might give you an estimate of age on your Anchor Hocking glass.
From their site:
Anchor Hocking basically used only three markings over its history. The original "HG over Co" was used from 1905 until 1937, the "anchor over H" used from 1937 until 1968, and the "anchor in the square" mark used from 1968 until recently. The company has started using a stylizied "anchor over H" in the last few years. The marks are pictured below.
From their site:
Anchor Hocking basically used only three markings over its history. The original "HG over Co" was used from 1905 until 1937, the "anchor over H" used from 1937 until 1968, and the "anchor in the square" mark used from 1968 until recently. The company has started using a stylizied "anchor over H" in the last few years. The marks are pictured below.
