I'd put this one at December 1959. General rule is the year is the first letter and the month is the second.
It is quite possible that they were making the switch over to the dotted glass panels for 1960 machines due to the push-button 160 being introduced around the same time.
Or, they could have been replaced at a later date.
Ben
It is quite possible that they were making the switch over to the dotted glass panels for 1960 machines due to the push-button 160 being introduced around the same time.
Or, they could have been replaced at a later date.
Ben