[Milsurplus] MHz Timeline???

[Brian McQueen]

Hello to the Group,

While surfing the net, I came across a very nice picture of a German receiver - F.u.H.E.u. circa - 1940.  On the escutcheon is imprinted in the die cast " MHz".  Of course, at that time and for many more years later, the U.S. was still using the megacycle designation.

Question 1:  When did we phase out mc. for MHz?  

Question 2: Did Europe (or just Germany) always use Hertz to designate cycles?

Just curious if anyone knows this tidbit of trivia to satisfy my curiosity.....

Tnx,
Brian    wj0p