1. I have seen one other example of a Relay 105 that had the Scientific Instruments label on it as well.
2. Has J.K-3 marked in the bottom right corner on the back A similar marking is on the Relay 82.
3. Relay were taken over or combined into the Ricoh Slide Rule group.

Brand	Relay
Model	105
Country of Manufacture	Japan
Scales Front	Centimetres, K, A [B, CI, C] D, L, Inches
Scales Back	[S, S&T, T]
Number of Scales	10
Slide Rule Materials	Bamboo/Celluloid
Cursor Materials	Metal/Glass
Cursor Lines	1 Front, 1 Back
Scale Length	25 cm
Length	29.5 cm
Width	3.9 cm
Condition	Good
Documentation	None
Accessories	Leather case