This guy has an awesome collection of German, WWII-era radios and other communications equipment. Apparently much of the equipment used precision megnesium alloy die casings which allowed them to provide a stable tuning without crystals, which I will pretend to know is cool.
Also, see if you can pronounce his domain name without wanting to fan yourself with your Sunday church newsletter.
LA6NCA German WW2 Radio Collection [Laud.no via WMMNA]