The Legend of the T1: First produced in 2006 by Rainer Popp. Already experienced in restoring antique padlocks, he was goaded by a friend to consider designing a padlock of his own. The T1 is what he came up with! A padlock with no visible openings, no key, and not a combination lock. An essential block of brass with a shackle and a mystery method to opening it. This is Rainer's "Lock That Started It All" that spawned what the Popplock name is today.