No, i could not find anything either.
The reason i looked was because i recently looked at a sale item on ebay - of a pillar drill, it was actually an old stanley pillar drill but branded singer.
Were they not primarily famous for sewing machines, but during the war were diverted into some form of militaria manufacturing ? / or bicycles ?
Seen the old factory plot on the clydebank a few years ago when i was a print service engineer.
Maybe a pic of the machine will reveal it's real identity...