I just picked up this nice Magistroni Senior headset.



I know they started using the toothed washer in the 30s but when did they stop using it? I think I remember a thread here or a discussion on the CR list about these toothed washers. Does anyone recall? My guess is they stopped making them in the mid 50s but that is just a guess. Any info will be appreciated.

Anyone?

East Hill

have you ever picked up any of chuck'ss catalog reproductions ?
https://www.velo-retro.com/list.html

this one might be handy for your area of interest:

!!! Legnano / Emilio Bozzi Catalog, 1950 -- 340 pages, parts and bikes from the manufacturer of Legnano, Perla and Wolsit bicycles. Beautiful steel plate engravings of Campagnolo, Ambrosio, Cinelli, REG, W.A., Simplex, Vittoria, Perry, Regina, Nisi, Fiamme, Binda, Martano, Pelissier, Christophe, Cornez, Universal, Bowden, Magistroni, F.B., Gnutti, Gaslo, Pirelli, Sheffield, Hutchinson, Superga, Delta, Silca, Bayliss Wiley, Brooks, Italia, Falck, Mannesmann, plus many lugs and fork crowns. Amazing document! Text in Italian. Three enlarged color scans of Legnano Mod. 54 Corsa, Legnano Mod. Roma Corsa and Legnano poster. Color cover. $ 45

I would guess 1950's, too. You'll find a reference to one with a toothed lock washer here:

https://www.blackbirdsf.org/magistroni/hs_knurled.html

You may want to ask the CR crowd about this.

I've had similar ones but marked OLMO or ARBOS for the bikes they're on. I have the ARBOS off now if you want to see a pic, I guess the bike is early-mid 50s. Does have the toothed washer/cup.

hmm
well i have a magistroni WELTER branded headset with a smooth washer and a smooth lower cup..
i can almost certainly date the bike to 1957
i don't know if it's a 'Senior' or wot though

Have you tried flowers and a phone call?

(sorry, I read the title and couldn't help myself )

An appropriate thought for Velotine's Day... .

East Hill