They seem to spawn after they are announced by the Southshore Crier.
|- Tailoring (185)||37||Tailoring||0.91%|
0.08% Chance of a rare drop.
1.33% Chance of an Uncommon drop.
0.91% Chance of a common drop.
1.41% Chance of a poor drop.
Note: % drop chance was correct at the time the page was generated/created. This will not be updated.