Tarnished Tinkered Items

Steps
Collect tinkered items by harvesting ? (questions marks).
 * A Tarnished Gear
 * A Tarnished Bolt
 * A Tarnished Cog
 * A Tarnished Spinner

Rewards

 * Experience
 * Coin
 * One of the following
 * (need item name)
 * (need item name)