Vintage Delco Atlantic China Set of 2 or 4 Heavy Ceramic Restaurant Coffee Mugs

These are the same coffee mugs that I remember from 'Perkins Pancake House' from my teen years in the '70s! - They are heavy and solid (1.12 lbs each) and each holds 8 oz. of liquid. The measure is approx 3.5" tall and the diameter of the mug is also 3.5" While the bottoms show minor shelf wear - I show no signs of 'spoon wear' on the inside, or any other flaws, so these may never have been used? They are heavily glazed BUT: They do not state that they are microwave and dishwasher-safe - I found one other listing on Etsy, and that listing also did not state if they were dishwasher or microwave-safe. I probably would just be safe, and wash them by hand, and not microwave. I will sell them either 2 mugs for $32 or 4 mugs for $55 - (4 will still be under 5 lbs) - - and will receive discounted shipping from the bundle of four. So, if you want all four - then bundle both sets and I will send the offer from your bundle. *If you are making an offer - please specify if that offer is for 2 or 4 mugs please. P.S. I did not realize until I listed these that they need to be washed better. There is still some newspaper print on them. (sorry)