I've recently come into a large cache of original documents from the Monroe Calculating Machine Company, spanning from 1919 to the 1970s. Most of these are Machine Service Bulletins, which were sent out approximately weekly to Monroe field offices around the country. These MSBs ran the gamut from one-pagers describing how to fix something, to 100-page manuals showing in detail how to disassemble, reassemble, and adjust an entire model of calculator.
There are also some course books, instruction manuals, ads, a newsletter or two, reference cards.
I've scanned all of these, and placed them on the Internet Archive for anyone to read!
Of particular interest are:
- The 1919 instruction book for the Monroe Calculating Machine [link]. The machine depicted is a model D, but 1919 would put it in the model G era.
- Machine Service Bulletin 34 [link], a full disassembly, assembly, and adjustment guide to the K-0 and KA-0 calculators.
- Machine Service Bulletin 40 [link], a full disassembly, assembly, and adjustment guide to the K-1AA and K-2AA calculators.
- Machine Service Bulletin 45 [link], showing what a bad day they were having.
- Machine Service Bulletin 95C [link], illustrated parts guide for various L and LA calculators with prices for each part.
- Machine Service Bulletin 116 [link] (with its supplement 116A [link]), a full disassembly, assembly, and adjustment guide to the MA-213 calculator.
- Book 1 in the Service Training Course [link].
Enjoy! And if you have any Monroe publications that aren't in the Archive, please let me know, I'd like to add them.