Looking at the movement... It seems they made the parts that suffer most from friction out of metal...
The rotating parts that don't suffer 'forced' friction are out of plastic, isnt it then just a little misleading?
Also the movement design is not based on friction free wheels, its just a default movement it seems..
I.e. they would have used bands instead of wheels or create a plastic based spring mechanism..etc.. but they did not.
I can understand that the progress tryout in different materials and plastic is from that era a prefered choice
but they did not go for a 100% plastic design friction free. I mean if you look at evolutionary design. This isnt it,
its more a try-out or was it even a market Gag? Which i think is odd being 'Tissot' ..but still its a nice try
Just an early morning thought..