hash
Precede Obviously!
All numbers from 1 to 998 precede the number 999.
An apostrophe (') should precede a number with leading zeros to ensure that the zeros will be displayed in a cell.
This is not correct for a sweet 16. Your serial number is incomplete. The gun should have a letter and or letter/number associated with the serial number to determine age. The letter should precede the 99230 or be above it
a digit (number) as opposed to a letter--
Gematria
character
Not a letter or number .It is Special Character
A single letter, number, symbol, etc.
key
character
Silver certificates don't always have a letter in the beginning of the serial number. They can have a star. Otherwise they all have letters.