This is read amplifier manufactured by Ferranti-Packard company, in or after 1958.
This type of module was commonly used by Ferranti engineers in the mid 1950s (and after it merged to become Ferranti-Packard in 1958) for various electronic computing projects.
Stachniak, Zbigniew, and Scott Campbell. Computing in Canada: Building a Digital Future. Transformations 17. Ottawa: Canada Science and Technology Museum, 2009, p. 24,27.
Ball, Norman R., and John N. Vardalas. Ferranti-Packard: Pioneers in Canadian Electrical Manufacturing. McGill-Queen’s Press - MQUP, 1994.