I was a little Leary ordering a drain for my 1950’s washboard sink but the measurements listed were spot on and it will fit perfectly.  I’m currently restoring it and was so afraid finding a drain to fit would be a nightmare and instead it was so easy.  The hardest part was choosing from so many drains carried by Wayfair.  The drain also matches the color of the stainless pull down faucet also purchased from Wayfair which is gorgeous and I’m looking forward to having a kitchen equipment with great fixtures.  All from the comfort of my couch.