1. This rule is marked "Made in Occupied Japan" and so it dates from the postwar (WWII) period when Hemmi again began making slide rules for Post but before the introduction of date codes around 1950.
2. Refer to Post 1447 (1) and Post 1447 (2) for other later examples of this popular little rule.

Brand	Post
Model	1447
Country of Manufacture	Japan
Manufacturer	Hemmi
Scales Front	A [B, CI, C] D, K
Scales Back	[S, L, T]
Number of Scales	9
Slide Rule Materials	Bamboo/Celluloid
Cursor Materials	Metal/Glass
Cursor Lines	1 Front, 2 Back
Scale Length	25 cm
Length	28 cm
Width	2.8 cm
Condition	Good
Documentation	None
Accessories	Cardboard Box