1937-38 Imperial Oil NHL Pocket Schedule Vintage Hockey Sports Calendar1937 38 Imperial Oil NHL Vintage Pocket Schedule Measurements: closed approx 4. 5" x 3" open approx 18" x 3" Great condition; notable edgewear throughout, notable corner creasing, minor stain on several pages, minor wear and tear Imperial Oil is a Canadian petroleum company, and supplies Esso brand service stations. From 1934 and onwards (until 1976) Imperial Oil was a sponsor for CBC and Hockey Night in Canada, leading to the creation of their