You can see from the brass cover plate that this floor spring was supplied by the Parwinac division of Parker, Winder & Achurch. It was common practice for architectural ironmongers and architectural firms to have their own names stamped on the cover plates for advertisement purposes, this has lead to much confusion when identifying floor closers. This particular floor closer is in fact a single action floor spring known as a Singlo, the double action version is called a Duplo. As can be seen the problem with this closer is a broken coil spring, M.F.S replaced the spring from our NOS stock and the floor spring is now back in service. The Singlo is in many ways identical to the Briton/Newman 600, the only real difference is the Singlo has a square pin.
As there is so little information out there with regard to door closers, especially vintage and antique model floor springs, I thought I would start this blog.