Seamaster cosmic 166.036 without T for Tritium

Greetings to all vintage omega enthusiasts.
This is my first post in your forum though I have been following it as a visitor for quite some time.

I have inherited my dad’s omega seamaster cosmic ref. 166.036 which has a serial nr 307XXXXX (year of production 1969) and was purchased by my dad new in 1972 .
The watch was first serviced in 2017 in Omega Switzerland, and then serviced again when I inherited it this year by a local watchmaker.

As far as I know it was never serviced before 2017 and it was never re-dialed. At least I don’t remember my Dad having his watch serviced before 2017 or re-dialed.

My concern is that in the dial it does not mention T before and / or after “Swiss Made” even though it has luminous hands and hour markers.

Is this normal?
I know that it might be normal for other models but according to Deric at the “Timeless History Channel” in youtube, he has never seen a gold plated omega dial with lume without the “T”.

Thank you in advance for your comments and assistance.

Thank you for your help, I really appreciate it. To the best of my knowledge my dad has never repainted the dial. The first service of the watch was at Omega headquarters in Switzerland in 2017. It was definitely relumed then. Is there any possibility that Omega watchmaker after reluming to had the “T” erased from the dial since at 2017 they have used different lume material?
Off course even if it is relumed it makes no difference since it is my Dad’s and I cherish it!

5 and 10 loom dots missing or the angle?

@AdamVT227 the watch had luminous markers and hands from the beginning. In any case I feel exactly the same like you. Ot's my Dad's watch and I love it.
@Wat-1 indeed 5 and 10 lume dots are missing because my late Dad must have abused the watch after it's service back in 2017...
I had it serviced again an an independent watchmaker this year after my Dad's passing.

Thank you all for your assistance. I really appreciate it!

@SOG53 you are completely right I love my Dad’s watch as it is. It has it’s own personality.
Just for the record I emailed omega, told them that the was serviced by them in 2017. I sent them photos and asked about the missing “T”. They replied that the watch is out of warranty. That the dial appearance indicates moisture in the watch and they advised to send it to omega for service…
Go fetch… They didn’t even bother to tell me what they have done during the service in 2017. And my Dad had paid them 750€ for that service!