Blacksmith at Town Hall 14: max level 7. At Town Hall 18 the cap is level 10. It unlocks at Town Hall 8. Max level per Town Hall: TH8 1, TH9 2, TH10 3, TH11 4, TH12 5, TH13 6, TH14 7, TH15 8, TH16 9, TH17 10, TH18 10.
Tap a Town Hall to open this item there. Dashed: not available at that Town Hall yet.