Vintage Nostalgic Saying Square Coffee Mug with Textured Handle

Unique square-shaped mug with finger-grip handle. Words are from old-fashioned calling cards used by ladies to announce their visit or leave an invitation. "At home on Sundays between 2 & 4pm. Hope you are the same." Vintage first letter script at start of each line. Design on one side, blank on reverse side. Very good vintage condition. Some minor paint loss to circles surrounding the saying. No crazing, cracks, or chips. No brand on bottom of cup. 3.75" H x 3" W at top (excluding handle).