Once the screws changed to Phillips the “Black Phillips” 110 did not change until the model was replaced by the 110 Super in 1982.

The serial numbers in the collection of the Black Phillips range from 1099544 to 2056665 although this does not mean a million units were produced! How the serial numbers are derived are a bit of a mystery, for example there are no units in the collection starting with 16xxx to 19xxx, just a jump from 1540411 to 2005298. Ideas anyone?