If your lock is indeed like the one you found images for, congratulations, it’s a very early model. It looks a lot like US patent 863,868:

That patent was filed December 7, 1904, and granted August 20, 1907. So the lock could be said to be from the early 1900s. The “NO NINE” on the back is interesting because I hadn’t run across that particular model number before. The company started in 1888 making door locks; this is their first patent for a padlock.
Looking forward to pictures of your lock.