My nephew uses them all the time and asked me to make some copies for him. The one on the left is an actual rooster and mine is on the right. The difference is the blade, roosters use minnow style blade - mine is a swing blade, but through a buy on ebay I have actual Swiss Swing Blades, actual rooster style blade. Check out the products on-line catalogues and you'll find most of the info but you'll have to root around for it.
The 1/16th and below rooster tails:
.024 wire
#1 folded clevis
Blade size is a #1 minnow style blade
Treble hook size on a 1/16th is a size 12 treble
The 1/8th oz.:
.026 wire.
#1 folded clevis
Blade size is a #2 minnow style blade
Treble hook size on a 1/8th is a size 10 treble