Vintage Bosch switch (logo). Both contact points are isolated from the case, so can be used for a current. Threads are fine. No cracks. Usually these Bosch push button switches have one contact connected to earth, so not possible to switch a current. Please see my other ads too.
Brass fuel filter. It's missing a screen, otherwise, it is OK.
It is marked "Harford Petrol Filter H.H. Ltd." I believe it's British made.
I can send more photos and I accept PayPal.