hello. i have the sony wm-f100 like you and had a difficult time finding a belt. i just found a generic size belt to fit the sony wm-f100 and it is a pn SB08.6 which is a .039 inch and 8.6 inch at www.studiosoundelectronics.com . I tried the 8.0 but too much force exerted on motor spindle. price is 89 cents each. there is a min order. It is a little bigger than origional sony belt but it is working. hope this helps.

I have a mint condition WM-10 with original headset. Make me an offer.

Have located a bulk lot of vintage 0.8mm & 1mm square cross section walkman belts in almost all sizes. Approx $2-3 per belt, approx $3 Airmail/$5 regd airmail. Feel free to contact. DocP

Hoi, Ik heb hier liggen een werkende WM-20 en WM-F103 (radio OK, deck draait wel, maar niet met cassette erin). Wat wil je er voor geven? Vr.gr. Tinus van de Wouw

dear daibanchuex, If you've located spare belts - I need a set for my wm 30 - can you help.

I have a used f-100III that was broken in the car door jam. I am certain that it would be good for parts. Make and offer... bill

MY EMAIL IS ALSO MY VERIFIED PAYPAL I.D. MY SELLERS I.D. ON EBAY IS VERIFIEDPAYPALONLY SO YOU CAN CHECK OUT MY FEEDBACK. I HAVE A STILL OPERATIONAL, BUT TOTALLY TAKEN APART RARE AS HEL;L SONY WM-10 MKII. BEAUTIFUL BUT ALSO IN TAKEN APART CONDITION. IT HAS A PERFECT BELT. AND THE MOTOR IS AS NEW. THE HEAD IS AS NEW. THERE ARE MANY OTHER USEFULL PARTS. I'M SELLING THE ENTIRE UNIT FOR PARTS. IF YOU MAKE ME A REASONABLE OFFER ABOVE $50.00, THEN IT IS YOURS.