60/70's Japan Chartreuse Green Drip Glaze Ceramic Coffee Mugs - 4 - Coffee Cups

This is a set of Japan chartreuse green/white drip glaze ceramic coffee mugs. The bottom rims are a basket weave pattern, and each mug measures 3 1/2" tall, 2 3/8" wide at the top and widens to 2 3/4" wide at the bottom. I believe they're from the 60's/70's. In very good vintage condition, there are some light scratches and crazing in places. As well, I want to point out that under the handles, each mug has a small hole. Manufacturing process?? Finally, one mug has a chip on the bottom edge. Please see the pictures for details. LOVE the color and style of these mugs. Please note that I cannot guarantee glass shipments.