|This is a 3-3/8" in diameter Boyce motometer mounted on an aluminium winged cap. It has a Paige dial insert and a Schlaich motometer lock device. |
The Schlaich device is pictured detached in the bottom photograph. It was made by the J.C. McAdams Sales Co. of New York City, N.Y. it carries the patent date of 2-16-25. It attached to the motometer's threaded stem and was secured using a small set screw. It is made from stainless steel and nickel plated brass.