Here are a few advertising mugs.  Both on the far left date these ribbed-bottom mugs to 1981 and both are marked Fire-King in script.  The Golden Jubilee mug is an anniversary mug printed in 1962.  The Bidall is late 1970s but the LaCroissantere isn’t even Fire-King, its Anchor Hocking.  Candy Ann’s is the real deal, from the 1960s and is known in at least 2 other colors.  From L to Bottom R the grading is:  C-, A-, B+, C-, B+, and B+.

6 mugs all dating to the 1960s.  Hand painted with various themes, Pineapple, Christmas, and kinfolk.  Bold and bright.  B-

Each of these Children’s ABC mugs is like the Holy Grail of FK mug collecting.  The run was apparently short, possibly because of manufacturing problems.  The black and red one is the only one I’ve ever seen, and only 2 or 3 times for each of the others.  As far as I know only the blue and red one is pictured in any of the popular Fire-King books.  A++

Here are some uncommon D handle antique car mugs with 2 different cars on each mug.  B grade from the 1960s.

A similar pair but in brown and red (with the name of the car worn off), a completely different series.  Also B grade.  These date to the latter 1960s to early 1970s.

Johnny Appleseed Junior Ecology Club  B- 1960s and an unknown advertising mug, a smiley face sun from the late 1970s,  also a B-