Compass 505. Made in Japan by Relay/Ricoh it is the same as the Relay 505, the SIC 5050, the Lafayette 99-7030 and the Lafayette 99-70302.
Dietzgen 1737. Made in Japan by Relay/Ricoh.
Lafayette F-428. Made in Japan by Relay/Ricoh it is the same as the Relay 151, the SIC 1510, the Lafayette 99-70559, the Sans & Streiffe 312 and the Jason 803. Date Code JS-3, 1961.
Lafayette F-686. Made in Japan by Relay/Ricoh it is the same as the Lafayette 99-7102. Date Code KK-4, 1962.
Lafayette 99-7128, Decimadyne. Made in Japan by Relay/Ricoh. Date Code RS-4.
Lutz 102S.
Lutz 252.
Olsen TL-472.
Relay 153. This has also appeared as the Ricoh 153, the SIC-Relay 153, the Omega DT-1015 and the Relay DT-1015.
Ricoh 82. This has also appeared as the Relay 82 and the Lafayette F-381.
Ricoh 102. This has also appeared as the Relay 102, the SIC Relay 102, the SIC 1020, the Compass 1315 and the Jason 800.
Ricoh 121.
Ricoh 150. This Rule has appeared under many other model numbers including Zodiak 150, Alvin 1150, AA SR815, Engineers 1500, Lafayette F-341, Lafayette 99-7031, Lafayette 99-70310, Micronta 150, Olson TL-373, Relay 150, Compass 1321, Jason 802, Sans and Streiffe 311 and probably others as well. The SIC 1530 can be found with several different scale sets, one of which corresponds with the Relay 150 so beware.
Sans & Streiffe No.312. This Rule is a product of Relay/Ricoh and similar to the SIC 1510, the Lafayette 99-70559, the Lafayette F-428, the Relay 151 and the Jason 803. Date Code IS-4, 1960.
Scientific Instruments Company, SIC 1050. This rule is built on an identical stock to my Ricoh 121. The Scale Set is the same as that on the Relay/Ricoh 105, the Sans & Streiffe 310, and the Engineers 1050.
Scientific Instruments Company, SIC 1520.
