What type of line (string) is on old reels?

Overall this item is in good condition with minimal wear and tear. This reel appears to still have the original string on it.

Vintage 1930s Dandee Chalk Line Reel Cedarberg Mfg Co

How To Spool A Spinning Reel With Braided Line (Save Money & Time)

Kirschbaum Pro Line Evolution 17/1.25 String Reel-660

EXPAND-IT 18 STRING TRIMMER ATTACHMENT - RYOBI Tools

Chalk Line Reels, Chalk Line Tools

3 Ways to Spool New Fishing Line Onto a Reel - wikiHow

How To Spool A Fishing Reel - put line on your reel!

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Commercial Round Line, Replacement Trimmer Line

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Does it matter what kind of fishing line you put on your reel, or

plastic, rope Winder grip line board-- special design and it is in fine craftsmanship. it is the best replacement for your old, broken one. 3d kites

Toyvian 2pcs String Grip Wheel Outdoor Kite Reel Wheel Kite Reel Winder Bearing Kite Wheel Winder Spool for Outdoor Kite Thread Spool Kite Reel Winder

How to Put Line on a Fishing Reel – Daiwa Australia

Vintage Antique Wood Wooden Kite Flying String Spool Spindle Reel