A few nice mold makers china images I found:
Vintage Milk Glass Salt and Pepper Shakers with Flower Power 70s Silkscreen
Image by GranniesKitchen
This set of vintage milk glass salt and pepper shakers are decorated with a green and orange flower power silkscreen.
The glass maker’s mark on the bottom indicate they were made by the Dominion Glass Company at their Wallaceburg factory in either January of February of 1977. The mould model number is 1632.