Hunts Capacitors.
 

I've just finished restuffing seven or so Hunts waxies in a pre war Murphy...
Most were marked as type 1618 (black print,) one as type 1619 (red print.)
Three had a red ring at one end marked OF (outer foil,) the others nothing.

This got me wondering...
I would assume that Hunts produced catalogues for the trade offering and explaining their products - I've never seen one.

Would anyone have seen or have access to a Hunts catalogue?