1920's Robot & Monster Art : Japanese Menko Cards

http://www.ebay.com/itm/1920s-Robot-Monster-Art-Japanese-Menko-Cards-vintage-antique-toy-military-war-/121992167753?hash=item1c674cc149

This is how people in the 1920's thought Robots would look like. 

WW1 had changed the warfare.

Science & machinery became vital. And, war became more terrifying. 

These cards might reflect that.