There are three other 4Q dollars with House Mold and the web address. There are also 2 others that are similar but have the SUN mold and the web URL. These were all issued 4-5 years ago. See the current TCR for numbers.

Numbers are usually assigned as soon as the authors learn about a new chip and are sometimes posted on this bulletin board. They only become official of course when the next update to TCR is printed.