Agree with you that it reminds the Speedy Tuesday first edition which I also own.
But they are different when you see them in the metal.
The ST has radial inscriptions on subdials which makes it so distinctive. And it was a very limited edition. I love mine.
This model has a gloss black lacquered dial with applied silver metal indexes and minute markers which make a real difference.
Both have a very different character and this makes them so interesting to have both in my collection.
Thank you for sharing your ST 1!! Keep enjoying and loving it so much!!
Best!
Abel