This is a beautiful surviving example of a "Dahlia" wristwatch in the cushion shaped case, one of the common brands of Seikosha (today Seiko) during the 1930s. The porcelain dial has hairline cracking but is in good shape otherwise. The movement winds and works with a little shake, but it is a vintage item so please do not expect regular use from it unless you are willing to get it serviced.I switched the lugs for new lugs (13mm) but I will include the original lugs as well. Strap not included. 
I have videos of the item on my instagram page, @mosaic_horologics.