1.25" has covered tin back with stickpin style fastener. There is no maker's name. The contrast of the piece is rather light as made but still clearly picturing a workingman's lunch pail above a clock face printed over crossed designs of a miner's pick axe and shovel. The clock face features Roman numerals and the clock hands point to 8 o'clock. On the upper edge of the dial design the inscription reads "Anti-Amalgimation." Within the clock face the slogan reads "16 TO 1 AND 8 HOURS." Essentially Mint condition and the only example we know of.