1960s Syracuse China Restaurant Grade Diner Mugs Variety Set of 3

The Syracuse China Company produced collections for home use, railroad use and restaurant use. These are from the restaurant/diner line. You can identify the time period in which they were manufactured based on the codes on the bottom of the cups.

These three in the set are coded as follows: 93-C =March 1964 90 = 1961 (same code used for all months that year)