Identifying the correct pool key number to register: it should be a 1 to 3 digit number between 1 and 150

Sorry for the confusion, but some keys have a reference number used by the locksmith. The actual pool key number on some older keys appears as larger numbers in the middle of the keys. On newer keys, the pool key number is on the right side in small numbers (the numbers on the left side of these keys is not the pool key number).