This is the version of the Cambridge Glass shaker top that has 6 holes and is flat on the top (vs. the more rounded version which has 7 holes). I believe these will also fit the Fostoria shakers, but I don't have one in stock to test it. See picture 2 for the top on a Cambridge Rose Point shaker.
The following milk glass salt and pepper shaker sets in stock are all in excellent condition (including tops) please specify which pair(s) you want in an email or in the Comments section of the Order Form ($21 per pair): Fenton 3" HOBNAIL (left, made 1950-1980, aluminum tops) $21; and Fenton 3" BLOCK and CROSS (right, made 1955-1966, tops need cleaning).
These Cambridge Caprice Pattern 4-footed salt dips in cobalt blue were made by Bennet from the Caprice molds. Excellent condition, very pretty. Price is for the set of 4.
This pair of c 1940s/50s Hazel Atlas 3 3/4" frosted glass salt and pepper shakers has the Outlined Fruit (apple and a grape) design by Gay Fad Studios, also used by Fire King. Glass, paint, and tops are all in superb condition. The reflection might make the tops look worn, but they are perfect. Bottoms are marked with the HA of Hazel Atlas.