Here is a French Primus stove catalog from 1929. The first file link below can be clicked on and downloaded for the high resolution PDF.
Primus paraffin stoves, lanterns and blow lamps (blowtorches) are stamped with a letter code starting in 1911. The letter code can be found on the bottom of the tanks of these liquid fuel pressure appliances. The letters Q and AQ are not used in the coding system. Starting in 1955, the code method changed and a six-digit code was used. The last two digits of the six-digit code correspond to the year of production. The six-digit code can often be found on the leg of the stove or on the burner riser of the stove. Toward the end of the last years of Primus production, the code was no longer stamped on the stove but was found on the carton the stove shipped in.
There is often an additional number or letter stamped on the tank. It is unclear what this was for, but it is possible it was a production line identifier, or lot batch number.
Primus is the only liquid-fueled pressure appliance company of which I am aware that dated their offerings with a date code. Other manufacturers appliances must be dated by examining the features of the appliance and comparing them to catalog drawings, photos, illustrations and known dated appliances of the type.
You are welcome to freely copy and distribute this dating chart, link to the dating chart, or link to this webpage. Click on the chart or the photos below for larger and higher resolution images. While I made this chart from scratch, I am not the originator of the chart. For the record, I only published my homemade chart here after I saw that the original chart (found on a popular and well-known social discussion forum requiring a membership and/or subscription fee) has been published in full resolution far and wide all over Pinterest. So, the horse has already escaped the barn. I do not believe knowledge should be held ransom behind a subscription fee. Apparently a lot of Pinterest users agree, and you should agree, too. 👍
Here are some examples:
PDF copy for better resolution: Manual_Optimus_8R
Here is a collection of Coleman documents and instructions I either have in my possession, was gifted by other stove collectors, or that I have personally collected. I’ll add more from time to time as I process and scan other documents on Coleman stoves. I hope that it helps some of you who are looking for information on these old vintage rarities. The really good images are the larger PDFs. Just click on the hyper-linked document name to download the PDF. Or, for those with limited bandwidth, click on the screen-readable JPGs for faster, but less detailed, viewing.
1945 Coleman 457 Handy Gas Plant Instructions Full-size 300 dpi PDF 2.7MB
smaller 72 dpi JPG 314KB smaller 72 dpi JPG 383KB
Coleman 348 Marine Alcohol Stove Instructions 3.3MB
smaller 72dpi JPG 234KB smaller 72dpi JPG 328KB
Coleman 419 Stove Instructions 28.8MB
smaller 72dpi JPG 616KB smaller 72dpi JPG 657KB
Coleman 500 Stove Instruction Sheet 25MB
smaller 72dpi JPG 495KB smaller 72dpi JPG 572KB
Coleman 500 Stove Manual 11.4MB
smaller 72dpi JPG 296KB smaller 72dpi JPG 320KB
Coleman 511A700 cat heater exploded diagram 557KB
smaller 72dpi JPG 354KB
This gallery contains 5 photos.
1920’s-ish, Click on an image to see it bigger, contact me for better resolution images