Bar-Let
Models and s/n	Y	M	D	Remarks	Ref.
Portable
up to 4300	1931			Model 1	13
9000	1932				13
11000	1933				13
17000	1934				13
19500	1935				13
30000	1936			Model 2, started in 1936	6,7,13
50000	1937				6,13
54800	1938				13
58800	1939				6,13