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#1641
Hah! The year was too easy, how long is the needle??
Jerry is correct. It is a 1940s Domestic (White) sewing machine, looking up from underneath towards the footplate showing where the bobbin is located (the bobbin provides the lower thread for the stitching).
This antique brass "engine" is used to form or modify the tooth profiles of watch gears. For a new gear, the teeth can be cut with a simple saw made to form a square notch with the proper circular pitch and depth. The rounding-up tool will then round off the square corners of the tooth tips to form epicycloidial addenda