F716XXXX is a 99K, check to make sure you have the correct number of digits. That one would be from 1916.
This throws a lot of people off, they look for F716. . . and stop when they get there, not realizing that it goes from
F 000,000 to F 9,999,999. Which means you'll find F 716,XXX and F 7,16X, XXX. It's even worse with the G series.