3.5" x 2.5"

Manufacturer was Canadian Pacific Railway, Angus Shops built in 1911. Backbone of CPR motive power fleet most numerous of any Canadian locomotive class with over 500 built and with more than half still in service at the end of the steam era.

https://ingeniumcanada.org/ingenium/collection-research/collection-item.php?id=1967.0009.001