@pert, based on the denomination, it's gotta be from the UK, right? Also, is DEPNT short for "department"?
Added: I didn't do an exhaustive search, but I note that Glasgow had a "City Improvements Department" :
Quote:
The first consequence was the replacement of the fragmented pre-war structure of building and letting by a centralised organisation, headed by the Corporation's Housing Committee (constituted
1916), on behalf of which a new Housing Department (created 1919) organised the building of houses, while the existing City Improvements Department was responsible for letting and
management.
https://i.rcahms.gov.uk/canmore-pdf/WP00003948.pdf