Old Timey Craftin' is a Legends of Idleon quest: 2 rewards.

Old Timey Craftin' | Idleon Toolbox

Old_Timey_Craftin'

Hold down to gain EXP in the skill that's displayed in the corner of your screen. If you're in a town, you will gain EXP in the town skill. The amount of EXP you get is based on your skill's Lv.

Small_Experience_Balloon

The full filtration process also involves filtering the diamonds through a vat of diamonds before using those filtered diamonds to filter the water! If only they'd filter their filtration process through diamonds so this item description wouldn't be so long.