This is all the belt info I have at this time….have tried to sort and organize it a bit, giving sources of the info. You can see that there is more than one size listed for the same model in some cases…..makes life interesting! Polly, 11-5-10 Bob at Allyn: Original Necchi part number 726021000 - 13 3/4" belt fits: Supernova Julia, Ultra, Ultra Mark II, Lycia 522, 523,524,535,533,532,530,554, 525
Sheila: I did order a belt for my Julia from Allyn. It is a german-made Contitech brand, and the numbers on it are: FO 5 X 330 Li (note: Polly: I have the same belt on my SN Ultra-from Allyn) The julia does take a different belt than the Supernova. It's bigger, I think. Sheila
Don/Redfish: The listing for the SNU is 1334 which is 13.75" or 34.925cm. (Don’t know what catalog these are from.) Bob: Original Necchi part number 726031000 - 14 5/8" belt fits: BU Supernova, Esperia, Nora, and Lelia. Also Necchi 510, 512, 513, 515.
Don/Redfish: Belt # listed for (BU) SN is 1434 which stands for 14.75"(fourteen + three quarters) or 37.465cm. From Ron: Necchi Nora (Gray) (the one with the square door on the top that takes little black "hat" cams) 2-speed transformer with gray plastic housing and light/power switch on housing. Belt: Alphasew 1312 (13 1/2") Lug Belt -The belt is slightly longer than the original, but was able to be tensioned correctly. Nora = 14.75 = 14-3/4” (not sure where this came from; could be a different Nora model than Ron’s above)
Bob: Original Necchi part number 726003000 - 13 inch belt fits: BU Mira, BU Nora w/ transformer under motor BU Mira = 12 5/8" Lug Belt – At http://sewingpartsonline.com/necchi-bu-mira-sewingmachine-parts.aspx (I think I got these from their web site☺ BU & BU Nova- http://www.sewingpartsonline.com/necchi-bu-sewing-machine-parts.aspx shows 15” lug belt Sheila: Lelia 510 = one that Sheila has is an Alphasew 1438 (14-3/8”??)
Sheila: I have a Lelia 513 with a pink lug belt, with the word "alphasew" and the number 1438
Ron: Necchi Lelia 515 (Pink) - Belt: Alphasew 1514 (15 1/4") The belt fits perfectly. Machine came from a Necchi sewing cabinet. Made in Italy motor, pulley marked "5" - Motor mounted on metal bracket with no transformer, no speed switch. - Light/power switch mounted at machine head. OR: if the above doesn’t help…… TIPS ON GETTING THE CORRECT BELT: Measure the distance starting from the balance wheel around the motor pulley back to and around the balance wheel. Do this with the motor set to the mid-point adjustment position. OR