What's the latest age you've seen a bantam rooster sprout up from nowhere?

[Whittni]

I've got 6 week old Silver Sebrights and don't see any comb growth. Wondering how old they might age up to if any are going to sprout a big bright comb and waddles.

 

[JedJackson]

Sebrights generally show comb/wattle growth early in the males. Silkies and Polish can look like pullets until much later. So it depends a bit on breed. But usually bantams are faster to mature than large fowl.