Back in the day when ingenuity was king and resin heads were in their early days. This actually is a nice looking lure, a bit funky but .. still a tube. Possibly an empty Rx bottle was used as the mold. The jets are nicely spaced and centered. 
Has a nice ombre double pour. Not sure what the posts look like but someone has skirted it for you already and as the old say'n goes "if it's not broke, don't fix it!". 

Skirted Weight: 9.7 oz / 274 gr
Size: 12" Skirted with 13" skirts
Condition: Good vintage condition.