This vintage Surety Savings and Loan Golf Ball Bank comes complete with its instruction card and 50 cent credit token.  Just fill up the bank, take it to Surety S&L, and Surety (and only Surety) will have a key that will unlock the underside of the bank. The saver will get money credited to his or her acoount plus a bonus.  What fun! Plus they are paying 5% as well! Gotta love the bank with its US Tiger circles pattern.