This may seem a bit weird but over a number of years I've saved a small collection of random Lego bricks I've found among driftwood/debris along the Ohio River bank, after rises and falls of the river. I enjoy collecting pieces of driftwood, and occasionally find fishing lures, bobbers and other odds and ends in my hikes. So recently, I was studying them closely and noticed a few are competitor brands including Mega Bloks and Tyco. But I can't figure out what the brand is of these two, with different logos on them. I will attach a pic of each logo. I tried to get the pics sharp and clear enough to make out. One of them is on the bottom and looks like an "A F" inside of a circle. The other appears on the top. It seems like it is familiar but I can't place it. Neither one of these bricks has any logo or lettering on the studs. Any ideas on maker or brand name?? Thanks!!
EDIT - An additional comment, added 7/4/21: Just added three more pics to show the bricks with the "AF in a circle" logo on bottom (the group of four). Although the red brick has it marked "correctly", all three blue ones have the AF circle logo backwards! Including pics showing both the top and bottom of the bricks. Don't know what type of plastic they are made from, but they have that softer, sorta "waxy" feel something like the PP (number 5) plastic. These were probably found in the 1990s.