Redial Seamaster 600?

Hello,

I just bought my second Seamaster 600 with a different type of dial than my first one (the one on the left is my second one). When I examined it in more detail, I noticed the different looking Omega logo and font (especially the letter G where the horizontal bar does not extend more than half the widht of the letter) as well as Seamaster font (especially that there is no gap between the S and first e as on most others there is a small gap).

Is that a redial? Or has anybody seen a similar dial in a Seamaster 600?

Thanks

Roger