c. 1934–1998
Unattributed marks
The source gives circa 1934 to circa 1998, but explicitly questions the final year.
glass · Australia
G and M are separated by a horizontal bar inside an open-bottomed A-shaped monogram.
Country guide
Australian glass manufacturers marks
Australian glass manufacturers marks include AGM and ACI names; mould and capacity numbers describe the container rather than its maker.
Factory emblem and container numbers
On a bottle base, keep a glassworks logo distinct from a large mould number. AGM and ACI are names encountered in Australian glassmaking histories. A country or company name can also occur on tableware labels.
What to check next
Record the full base and bottle profile, including closure and seams. Use the actual emblem and lettering to choose a manufacturer before attempting a date-code reading; an isolated number can be a mould identifier.
Related marks
1 mark