Plymouth College Coat of Arms 

The mug features the coat of arms for Plymouth College, a co-educational independent day and boarding school in Plymouth, Devon, England. The Latin motto on the mug is "DAT DEUS INCREMENTUM," which translates to "God gives the increase" or "God gives growth". This motto is a quotation from the New Testament (1 Corinthians 3:7). The coat of arms itself includes: 

* A crest with castles. Castles are a common symbol in heraldry, often representing strength, defense, or a specific location.

* A green saltire, or diagonal cross. The saltire is a common heraldic symbol with various meanings, often associated with Scotland, Burgundy, or other regions. 

made by Stanley Cox Ceramics. 

* The company was located in Totnes, Devon, a market town in England.

* Stanley Cox Ceramics produced promotional mugs and other stoneware items.

* The text "MADE IN THE UK" is also visible on the base of the mug.