NOTE:UNITED STATES GLASS CO. 1914 SODA FOUNTAIN CATALOG. Karen Welch: The one labeled L 74 I would interpret as being O'Hara No. 74, a pattern we do not yet have documented. O'Hara became Factory L upon joining US Glass. It is interesting they are still using this type of nomenclature as late as 1914, but it was common in some of their earlier catalogs.
NOTE: Sid Lethbridge 2024 - there is no appearance of a No. 74 sundae dish - a form that was common in the 20th century but not in the 1880s/early 1890s - in the available O'Hara catalogues.