Head set


<STRADA>
proto type
1st
O-ring which made of piano wire ??
O-ring which made of plastick.

2nd
3rd
4th


often uesd LEGNANO
has Center Line
engraved Letters on Flat face.
Fluteless.


NON engraved Letters.
on Top screw race


proto type
1st
2nd
3rd
4th
Year 1956.7
from Le cycle
1956 1958 1959 ? 1960
Locking Nut Šp’£‚Á‚½
Square
(never seen)
dome ¨ ¨ normal
Locking washer endraved letters ¨ ¨ ¨ no letters
(normal)
Top screw race smooth & round ¨ has Center Line smooth & round <Side>
a–³‚µB•½‚ç‚È•\–ʂɍˆó—L‚èB
engraved Letters on Flat face.
Fluteless.
<Upper>
NON engraved Letters.
Top head race O-ring
made of PIANO WIRE??
O-ring.
Made of plastick.
NON O-ring ¨ ¨
Bottom head race smooth & round ¨ has Center Line smooth & round <Side>
a–³‚µB•½‚ç‚È•\–ʂɍˆó—L‚èB
engraved Letters on Flat face.
Fluteless.
Crown race O-ring
made of PIANO WIRE??
O-ring.
Made of plastick.
NON O-ring ¨ ¨


5th Normal
5th open(horse shoe shaped) "C"

almost are french threads.




<PISTA>
1st ??

take off from 1957 Learco Guerra bike.
Locking nut is very thin.

<3 type of Locking Nut>
The difference in the thickness.

<3 type of Locking Washer>
(The Top )....................Delicate engraved Letters
(The Inside).................Clear & shaped engraved Letters
()The Bottom..............Small Letters





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