1938 2.9 Alfa Romeo Spider by Touring.

 
 

The bumpers are formed from machined brass strip, with a centre section made to clip in place.  This is later chrome plated and hides the bumper fixing screws.  The bumpers are formed to shape around a shaped forming block of machined brass. The front bumper requires a second piece to be silver soldered to the insert, to take it around and under the radiator shell.