According to Swiss Time who are the UK Omega vintage arm it's just a very rare early dial. It doesn't have any tritium so why would it say T Swiss T your dial has tritium on it.
Notice yours also has a black subdial at 6. Yours is the far more coming Seamaster dial.
Ehh? Come on. If it's a redial where did it come from? That's a pretty shallow accusation to make without actually being able to prove it.
It could even be a prototype.
Yours is definitely a redial. Well a re everything. It's new old stock!!
I have well trained eyes, all 176.005 in steel had T Swiss made T dials and there were 2 silver dial versions, I'm a professional watchmaker and have a good knowledge about vintage Omega watches and yes it's true I have many Omega new old stock watches and never use the term nos unless it is, check out the red dot on the side of the watch on the picture it's factory sealed and was never opened
The watch in the OP has luminous hands so the dial should have the tritium "T" on it if it was original. It could well be a late 90s (or more recent) service dial.