Dating atlas canning jars
You may see at yard sales or flea markets real, genuine Atlas Mason jars, made by the Hazel-Atlas company, floating about inexpensively.
All their Mason jars had the symbol HA on them; it stands for “Hazel-Atlas”, with the A tucked under the H.
The other ones, which use outdated closure systems which proved less reliable, should only be used for dry storage. (Click to enlarge.) Img src : Canning Helps By Hazel-Atlas.
The Alan and Shirley Brocker Sliker Collection, MSS 314, Special Collections, Michigan State University Libraries.
In 1957, the company was bought out, and entered the now all-too-familiar process of being digested by larger and larger corporate entities.
Note: for a discussion on what the pros say about re-using commercial jars in general for home canning / bottling, please refer to: Re-using jars from store-bought products .
", "title": "", "comment_count": 0, "board": , "type": "pin", "image_signature": "33816a8a1e2b0132f0abf0ee298c75d3", "attribution": null, "description": "My first installment of Ask the Crazy Junk Lady..month I am answering questions that my readers have asked me about vintage canning jars!
The companies that bought Hazel-Atlas out seem to have stopped using the Hazel-Atlas name, and the HA symbol, sometime after 1964.
Provided they are not chipped or cracked, the two square models (1 and 6) which take the 2-piece lids, could still in theory be used in following modern home canning recommendations.
Available at https://msu.edu/exhibits/sliker/detail.jsp? id=6195 The Atlas “Mason” jars that you see now used for Classico pasta sauces were never actually made as actual, genuine Mason jars by Hazel-Atlas.
It appears stamping the jars as “Atlas Mason” is a packaging / marketing technique of the Classico company.