1.25" unlisted in Hake. Reverse has paper from Pittsburgh firm "Colonial Press McMahon Bros." Collet holds 2.25" ribbon with gold text "Labor Day Celebration/Local Union 5085/Coverdale, Pa." Below the ribbon text is a Baltimore union bug. Button features crisp black and white real photos without dot patterns. This piece has realized $3,000.00 in an Anderson auction and a foxed example realized $2,200.00 on eBay. A single pin point black dot to the left of the Lewis circle is as printed and the piece is essentially Mint as made. Rare.