We couldn’t be more confident that the Telechron 1F312 clock we just purchased off ebay is the right accessory for the Quarry School. This model was widely used in schools beginning in the 1930s, and an eastern classroom photo from 1955 shows one reading 10:41 a.m.
Although we do not have a photo of the clock that hung in the western classroom, its shadow can still be seen on an untreated wall (bottom photo).
We’ve located our “new” clock on the wall opposite its original location because it suits our current-day use of the room, however, when the school was in use, students were always seated with their left shoulders to the windows (this put natural light on the desktops of right-handed students), and the clock would have been visible to them on the western wall.
Does anyone remember watching this style of clock?
As you can see from the to-do list on the original blackboards, our renovation’s not yet complete.
QUARRY SCHOOL 
Thats the clock alright