Winterabzug MP pics?

[Vatch]

does anyone have pics of the Winterabzug MP - The winter trigger that was added on to the mp 40. A simple plate fitter over the trigger housing that linked through to an outside lever which put pressure on the actual trigger when pulled back. it was used so that the firer could still wear his thick gloves and operate the weapon. Some pics would be greatly appreaciated. thanks. - Vatch