This is my Dominant (AS 984).     Googling for info about this guy is a nightmare as you can imagine (if you can't imagine just try and see). I have only seen one other example on eBay which was for a cushion cased rose gold example with a 17 jewel version (mine is a 15) of what appears to  of the same movement and exactly the same fonts on the dial. Being gold it was hall marked which dated it to 1944 so I guess mine is of a similar vintage although at 34mm excluding the crown, mine is la