Does anyone have any idea what this little arrow thingie is on this Omega and if the lumed numbers are original? I've not seen the arrow on an Omega before and the numbers look a bit sloppy!

Hello,

Got this one in a bulk lot of gold watches and I was hoping people might be able to help with the model and Ref?

Can anyone help out with an ID on this one, I'm struggling. Vintage Omega Seamaster ref. 166.010-63 S.C cal 562. I haven't seen many Seamaster with a Pie Pan dial and ever fewer with a crosshair as well. Seen it plenty of times on the Constel…