Small Pocket Watch

Creature	Level	Chance
Foreman Rigger Rare elite	24	0.3%
Arikara	28	0.04%
Addled Leper	24-25	0.02%
Ashenvale Outrunner	23-24	0.02%
Bael'dun Excavator	21-22	0.02%
Bael'dun Rifleman	24-25	0.02%
Blackfathom Sea Witch Elite	22-23	0.02%
Blackrock Shadowcaster	22-23	0.02%
Blindlight Muckdweller Elite	23	0.02%
Blindlight Oracle Elite	23	0.02%
Brain Eater	28-29	0.02%
Brutal Addled Leper Rare elite	26	0.02%
Brutal Bael'dun Excavator Rare elite	23	0.02%
Brutal Bael'dun Rifleman Rare elite	26	0.02%
Brutal Dabyrie Laborer Rare elite	32	0.02%
Brutal Daggerspine Shorehunter Rare elite	32	0.02%
Brutal Galak Stormer Rare elite	28	0.02%
Brutal Hillsbrad Councilman Rare elite	27	0.02%
Brutal Hillsbrad Sentry Rare elite	29	0.02%
Brutal Marez Cowl Rare elite	41	0.02%
Brutal Syndicate Watchman Rare elite	22	0.02%
Cenarion Botanist	23-24	0.02%
Dabyrie Laborer	30-31	0.02%
Daggerspine Shorehunter	30-31	0.02%
Daggerspine Siren	31-32	0.02%
Defias Inmate Elite	23-24	0.02%
Defias Prisoner Elite	23	0.02%
Dread Brain Eater Rare elite	30	0.02%
Dread Rotted One Rare elite	27	0.02%
Elder Stormhide Rare elite	24	0.02%

Battered Junkbox	2.5%
Worn Junkbox	0.1%

Where it comes from