This is my Primus 4, date code E, made in 1915. I don't know why, but the E is stamped over the D. It seems that the introduction of the Model 4 was old and the model is already listed in the catalog of around 1903. The tank capacity is about 1.5 pints. Mine is equipped with a "deep-skirt" R126 burner. However, in 1915, the R132, which had the same "deep-skirt" but a different shape of outer hood, would have been equipped to the Model 4. So please note that mine (R126) is not an appropriate fitting. It was fitted like this before I found it (over 10 years ago), so I'm guessing that at some point in its history the burner was replaced from R132 to R126. I checked the available parts lists for the Model 4 burner. The 1903 catalog lists it as part number 132. The 1905 catalog also lists it as part number 132. The 1907 catalog also lists it as part number 132. The 1914 catalog lists it as part number R132. The 1922 catalog also lists it as part number R132. The 1925 catalog lists it as part number R126. The 1930 catalog lists it as part number 4126/4125. (4126 has a brass outer cap, 4125 has an iron outer cap). There are 2 things I'd like to know about the burner. 1) What is the difference between the 132 and the R132? The 1907 catalog describes 132 burner, 670 outer and 675 inner. The 1914 catalog describes R132 burner, R670 outer and R675 inner. There are several stoves in the gallery with pre-1914 date codes that have these burners. And judging from the pictures, the 132 and R132 look identical. Are the 132 and the R132 the same burner, just with different part numbers? 2) What is the difference between the R126 and the 4126/4125? There are several stoves in the gallery with these burners that have a post-1930 date code. And judging from the pictures, the R126 and the 4126/4125 look identical. Are the R126 and the 4126/4125 the same burners, just with different part numbers? If anyone could let me know, I'd really appreciate it. Regards Shinzo
I don't believe there is a difference, just an update in nomenclature, R most likely standing for Reservedela (i.e. Spare Part No.). The major change is as you note when they changed from a fixed ring and removable cap to a combined ring and cap. @igh371 Ian may be able to expand a little as an expert on oldies? (rather than an oldie expert ) Alec.
