O Owain Member Messages 369 Sep 17, 2019 #1 Electrical notes drawn by an apprentice, probably 1920s or 1930s. Includes lighting, electric bells, house telephones. http://s000.tinyupload.com/index.php?file_id=80689666295463618900
Electrical notes drawn by an apprentice, probably 1920s or 1930s. Includes lighting, electric bells, house telephones. http://s000.tinyupload.com/index.php?file_id=80689666295463618900
