Help identifying movement appreciated!

[gonzo67]

The hallmarks on the case date this watch to late 1920s. But cannot Identify the movement. Main plate is marked MARU in a triangle but can't find any related info online. Any ideas? Many thanks in advance!

J

 

[watchweasol]

Hi what size is the movement as we may be able to find it in the bestfitbook, MARU doesn’t show up in mikrolisk.

[RichardHarris123]

I checked mikrolist too, nothing.  The only reference I  can find is for a modern company. 

[JackH]

It looks close to the Unitas 150. I am going by the keyless cover plate shape.

[JackH]

I also found this on another site. Identified as a Unitas 150. Bridges look the same. This one has more jewels.

[gonzo67]

16 hours ago, watchweasol said:

Hi what size is the movement as we may be able to find it in the bestfitbook, MARU doesn’t show up in mikrolisk.

It measures up at 23.5 diameter and 4.5 depth. Thanks for the input!

8 hours ago, JackH said:

I also found this on another site. Identified as a Unitas 150. Bridges look the same. This one has more jewels.

This is the closest match that I have seen