Very good question....
Only time will tell if this number has been associated with a HL product if or if it becomes an "empty" number like a few other HL numbers out there (ex. HL314, HL321, HL328, HL334, HL458, HL549, HL550, HL629, HL653, HL666, HL669, HL670, LL128, LL249, just name a few.....)
The real question becomes what happens to "Special editions" now that the 600's group of numbers have been filled!
Only time will tell (tick, tick, tick) or perhaps a Harbour Light employee.....