CB77 Dates in hubs?

[G-Man]

Hi Guys

Just made a little discovery while cleaning up the hubs of my CB77. I was going to bead blast them but something made me decide to just clean them up with soapy water to begin with.

Inside each hub is a set of three numbers which look like they might be dates. The numbers are just ink stamps and the front and rear use a different pattern which may just mean that they came from different suppliers.

The rear reads "63.11.21" and the front reads "28.12.3" which I optimistically translated into 21st November 1963 and 28th December 1963...........

My bike is a '64 model with :

Engine CB77E 102535 and
Frame CB77 102533

The wiring harness reads 1963.

Anybody else noticed numbers like these? Send me some numbers to disprove my theory.......

G