Rider Perpetual Troubleshooter's Manuals

Brand	Model	Volume	Page	Pub year
Detrola Corp.	342	11	11	1940
Detrola Corp.	3422	12	6	1941

The Michigan Vintage Electronics Club has a "garage sale" event during Plymouth, MI's Old Village Yard and Trunk Sale, April 26 8am-3pm. Located on Mill St near the RR tracks.
The next Vintage Electronics Expo will be on Saturday, October 4, 2025, 9 am to 3 pm in partnership with The Kalamazoo Hamfest.
at the Kalamazoo County Expo Center, 2900 Lake St., Kalamazoo, MI