6 cups and saucers, late 60s

Set of six coffee or tea cups with matching saucers, dating from the late sixties. Unknown manufacturer. Each piece is marked with a stamp decorated with the letter "a" and numbered "75" on the bottom (see photo). Condition: perfect vintage condition (no splinters or cracks, just the bottom of a cup and two saucers with a little cracked - see photos). Other possible shipping methods than those indicated, so contact me!.