Antique PERKINS Push Button Light Switch Single-Pole

Description

Here we have a Vintage PERKINS black push button light switch.
Not tested, but the button goes down/up
with nice click.
It is marked ULD  LAB  INSP., 10 A-125V & 5A-250V.
Please see photos for more details. Thank you.
This is no a t reproduction but isa genuine antique!!