Extremely hard to find any number besides a zero with black plates and a smooth boiler. Here's a No. 1 that fits the bill. Circa 1910.

Here's one with the 1911 date stamped into the motor.

Note Rivets early versions may have smooth boilers

Side by side comparison of most of the smaller Locomotives from 1909-1911. Note the one in the middle that has the plate 'The IVES Miniature Railway System'.  It was actually pictured this way in the 1908-09 catalogs - but the couple that we've actually seen were both from approximately 1909-1910