JHP 147: About your question I have no idea, but the gun shipping to me also has the (military) crossed swords on the frame.
On the exposed area of the slide, mine has a T at the end of the serial #s, but there is no circle around it, unlike your encircled T.
A Czech lawyer is a member of TheHighRoad, and petitions the Czech Parliament on continued resistance against the sleazy Euro-Crats' pressure, regarding the unique Czech gun freedoms. Thousands of Czech citizens have acquired CCW permits.

Very many own AKMs, VZ-58s etc.

I just now sent him your question. Your stainless is such a beauty.
He is good about responding from Prague, Czech Republic.