It is a Tech. Most people like them. As to cost, that is against the rules, but I would not loose any sleep if I were you.
Welcome to B&B.
I don't see a date code. If it really is missing that would date your Tech to 1946 - 1951.
+1000Beware the Derby. Mild (dull) blades can cause more irritation than a middle of the road one due to tugging hair. Some people like them, but for me, I'd be better off shaving with tweezers.
Welcome Aboard!
+1000
Some people have a way with words.
derby = pain
As I'm a beginner, I thought of starting with a mild razor and mild blade (Derby) to get my technique right and avoid unnecessary nicks.
After that, I can proceed to some aggressive ones.
Thanks for the feedback!