Harmonica (Fallout 3)

Harmonicas are miscellaneous items in Fallout 3 and Fallout: New Vegas.

Characteristics
They are only useful as Rock-It Launcher ammunition. They are somewhat rare except for random placement in containers or in different creatures' bodies. A few merchants and traders such as Moira or Crazy Wolfgang will, on occasion, sell one or two. They also usually appear in grocers on a counter or in the aisles.

Fallout 3

 * 17 spread throughout Red Racer factory's factory floor.
 * 11 inside Meresti Metro station.
 * 8 in Evergreen Mills foundry.
 * 1 in Willy's grocer.
 * Randomly found in metal boxes.
 * Sometimes found on feral ghouls and centaurs.
 * Sometimes swampfolk will carry them.

Fallout: New Vegas

 * 3 on Vault 19's first floor.
 * 2 in Vault 11's living quarters.
 * 1 in Brooks tumbleweed ranch, on the table next to the ham radio.