Yes, specifications are correct. I am not sure why that site doesnt have the .1 btc 1/4 silver ounce coins listed.
Interesting, do you have any links with info? Please post the photos ASAP
EDIT: found info on the mintage thread.
.10 Btc silver:
Approx all series cumulative total of 2,000 minted.
Ser 1, Funded, serialized, "black label". (printed serial number on coin.) Approx 500+ minted.
Ser 2, Funded, serialized, "green label". Approx 1500+ minted (cumulative of funded and buyer funded.)
Ser 2, Non funded, Laser marked "buyer Funded", serialized, "green label".