Well, while browsing through eBay for siren listings, I encountered this thing.
Image credit (except for mine) goes to eBay. Here’s the listing if anyone wants to check it out: https://www.ebay.com/itm/204246015231?_ ... %7Ciid%3A1
This appears to be some sort of small siren, with a VERY similar design to the MS-190. For example, here’s mine.
Now I’m not sure exactly who made the original siren however the listing does show images of the box. The box unfortunately contains no manufacturer information.
This is without a doubt a 190 predecessor as the box is very weathered and the siren itself looks old.