I know nothing about fly fishing but these are what someone else tells me they are for, I found them in the rubbish bin at an estate sale and got them for nothing. Below is $20 shipped or trade for silver (I will pay shipping).
The boxes are marked with the following marks:
O. Mustard & Sons Key brand Mustard-Limerick Hooks Made in Norway.
Here is a list:
The Following are unmarked or I cannot read the markings:
-1 Box Maybe No2 appears full
-2 boxes maybe no 10 appears full
-1/2 box hand marked “Short Shank”
-1 box Unmarked almost full
No 4:
-1 box more than half
-1 box almost half.
No 1:
-1 box appears full
No 6:
-1 box has 21 hooks
-1 box appears full
No 12:
-1 box about half
-1 box almost full
No 2:
-1 box almost full
-5x appears full
No 10:
-1 box about half
-4 boxes appear full (one missing top)
No 8:
-4 boxes almost full
-3 boxes appear full
