Vintage Alvin TS2 Telescoping 3" opening Black Plastic Tube 27-48.5" fishing

Alvin TS2 extendable plastic tube case. Extends from 27 inches to 48 1/2 inches with a 3 inch opening. Made in Italy. Case is in good used condition with shoulder strap. That is also adjustable. Black. Could be used for documents or extended for fishing poles or posters or ???