.....one of those watches I was not really looking for, but when I saw this combination of silver/steel and red-gold I went for it without any hesitation. It is an Omega Seamaster CK 2451-7 with the 321 movement. The watch was delivered on November 28, 19...
It was more common to mix metals to give better contrast. Here's another example from 1968: Must say I like it. Gives the watch better contrast and a warmer tone! Best Blomman ...