Closer to being what it should be. I now have 32/40 rims with hi-flange Campy 3piece hubs. This is the original 1955 Grand Sports. will still need to chase down some parts but at last it's going in the correct direction

Nice. Love to see this sort of thing.

LQQKing forward to seeing more of this.

I have a similar project and .............

Very exciting project. The Fothergills and the Longstaffs are two of my favorites. Is that a chrome spoke protector? Nice paint!

Pretty color, looking forward to more.

Yes a REG. Yesterday I checked all my Williams sprockets for the correct type 3/16 but could not find the one needed---back to Ebay!

Williams sprockets? Your freewheel was made by Williams? I have some extra Atom sprockets from a 4-speed.
By-the-way, how did you find a matching pair of 32H-40H rims?

The freewheel is a 4 speed Regina the BB is Bayless Wiley and the sprocket/arms are Williams. Rims are Worbler /Mavic. Both are box shaped rims in hi polished alum ( with hook bead ) Both in 27" size.

not a Williams sprocket, it is a Williams chainring.
That Campagnolo GS RD is for a 5 speed freewheel using a 3/32" chain.

I am unsure of your reference to a "correct type 3/16"
A 3/16" chainring is going to require a 3/16" chain and I don't think that would go through the RD.
And I don't ever recall a 3/16" multispeed freewheel in the 1950s.
This is from Holdsworth's Aids in 1955 from the V-CC Library.



It will be interesting to see if you can use the limit screws to restrict the derailleur to the 4 speed freewheel range.

Your right my bad--3/32 chain ring (they did use 3/16 chain but only on war bikes) I'm sure the GP will work just fine on the 4 speed.