Duke Thomas first appeared in Batman #21, published by DC in 2016. That places it in the Modern Age.
Why this issue matters
Introduced during the We Are Robin storyline, Duke Thomas later became the Signal, a daytime-operating member of the Bat-family distinct from the traditional Robin role.
Key facts
Batman #21
- Character: Duke Thomas (Signal)
- Publisher: DC
- Cover year: 2016
- Era: Modern Age
Before you buy or sell one
- Check it is a first print, not a facsimile or reprint. Newsstand and direct editions are priced differently too.
- Condition decides most of the value. Whether grading is worth it depends on the copy.
Go deeper
Other first appearances from 2016
- Riri Williams (Ironheart) Invincible Iron Man #7, 2016
More DC firsts from the Modern Age
- Damian Wayne Batman #655, 2006
- Absolute Batman Absolute Batman #1, 2024
- Absolute Green Arrow Absolute Green Arrow #1, 2024
- Cassandra Cain (Batgirl) Batman #567, 1999
- Doomsday Superman: The Man of Steel #18, 1992
Got a copy?
I buy key issues and whole collections across the UK, and I will tell you honestly whether what you have is the real first or a later printing. Send me photos of the cover and the indicia and I will come back with a straight answer, and a proper valuation if you want one.