ZENITH (AKA) by National Glass Company (Pittsburgh-PA, Operated: 1899-1904), c1903 Introduced
NOTE: Sid Lethbridge - This butter appears in an Spring 1903 Butler Bros. assortment with National (Riverside) No. 478 aka Fleur-de-Lis and Fan and National (Riverside) No. 508 aka National Star. At minimum, that tells us that this butter was made at one of the National Glass factories. At best, it was made at the National's Riverside Works.
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Shape: Butter, Cheese, & Honey Dishes
Contributor: Robin Fisher Cisne