Thank you Gdads51 for the heads-up! (I thought I posted a reply here earlier but it never showed up, sorry.) The images you included (plus those from the eBay offering) show a lot of great info. My local library here in Spokane is actively working to get a copy of that one instruction manual through an interlibrary loan from an Academy of Fire Science library in upstate New York, so hopefully that will work out and I can look at it for free. Thanks again!