[Voxophone]

Hi all,

I have a GPO 300 series (or similar) which has a metal push button installed low on the front (below the dial, and above where the drawer would be).

To me it appears that the button may have been added retrospectively by a user by drilling a hole in the case - it doesn't match the kind of buttons I'm used to seeing on 'phones with 'Call Exchange' or 'Recall' buttons fitted from new.

Is anyone aware whether adding a button such as this was a common practice, or what purpose it may have served? Could it have been a way to add a 'Call Exchange' or 'Recall' function to a 'phone which otherwise didn't have it?

Cheers,

Liam