Denomination: 1 BTC
Material: .999 Silver
Diameter: 39 mm
Thickness: 3 mm
Weight: 1 ozt
Best Grade: MS-70
Notable in this coin is the ‘laser rimming’ which appears on the edges of the series 3 hologram as a golden texture. Mike theorized that the process would create an interesting obstacle to anyone attempting to tamper with the coins.
This process has later been utilized by Lealana for some coins. These coins were sold and shipped in tubes of 20,though some individual orders were taken initially.
Casascius had originally intended to produce 5 BTC silver coins, but though the mold was created, the plan was scrapped in favor of 1 BTC, 0.5 BTC, and 0.1 BTC series 3 silver coins due to the “tenfold rise in the Bitcoin price over the past four months”1 to 140 USD.
Interestingly, some of the late-funded (LF) coins were sent to be graded by ANACS long before they were actually funded. That means that there are a number of slabbed and graded coins which were un-funded at the time that the grading took place.