How can you guys tell if something is correct or incorrect? Were there parts catalogs published by the manufacturer that have detailed photos of all the variations? It is/was common to have different equipment for different parts of the world. Unless one has access to such reliable authentication how does one determine "correct"?
Yes the Parts Manual gives chassis numbers as break points for most things on Sprints, Spiders, Ti's and Berlina's
It's not infallible as things were more or less in a constant state of flux with the Giulietta's, remember that three different Coachbuilders were involved, Bertone, Pininfarina & Zagato. The Factory or Centro Stilo built the Berlina's and Ti's. Italian record keeping is nothing like German record keeping.
My own Series I Sprint Veloce Confortevole, E06193, one of 50 with aluminium frames on the doors to receive wind up windows never made it into the Parts Catalogue, The Factory gives chassis 1493*06600 as the breakpoint for the transition from Series I eyebrows Sprint to Series II egg crate Sprint, but in reality the last Series I built was 1493E*06611, a Sprint Veloce Confortevole. The 10 cars preceding E06611 were also all Sprint Veloce Confortevole's but from the second production run of 149 cars without the aluminium frame around the doors. 199 SVC's in total - not found anywhere in the Factory info as a specific model, just listed as Sprint Veloce.
So we can make an educated guess that 1493*06612 is thus the first egg crate Transition or Interim Sprint. The earliest Transition car in my archives is 1493E*06878, D'Amico & Tabucci recorded E06611 as the last Series I, so until 06612 is found we have to put a peg in the ground somewhere as to what is what.
The only constant was Alfa was change, from the earliest Sprints & Spiders through to the last 1600 Giulia's which became 1300's again. Remember there were two distinct Transition or Interim phases, the first one was the change from 750 to 101 and the second was the change from 1300 to 1600 - here certain Giulia Sprints and Spiders were built as Giulietta's and this is reflected in Fusi in '62 where the Giulia Sprints and Spiders are shown twice with different numbers built.
Add to this that there was a USA Export Spec and a Home Market (Italian) Spec and a French Market Spec where cars has differing levels of equipment - the USA Spec in general had Lucas 'Football" tail lights or later Red/Red white and no front fender repeaters, sealed beam headlights with MPH gauges and for a brief period a unique designation of 10104 or 10105.
The Italian or Home market spec had amber/red/white tail lights, metric gauges and fender repeaters, French cars got a glass brake fluid reservoir and a special info plate next to the data plates, German delivered cars also got an extra little tag as did the Willy's-Mexico cars.
So while the above is good in theory, in reality different spec cars were delivered wherever the call was the greatest. Alfa being Alfa shipped whatever was in the stockyard to whoever shouted the loudest. One of my '57 Sprints was delivered to South Africa with metric gauges and SA only went metric in '62 - as it's Grigio Chiarissimo, which wasn't a very common colour, I can only surmise that there was a call for that colour and Alfa shipped whatever was in the stockyard at the time, which was a Home Market Spec car. A friend has a USA Spec '62 1300 Giulietta Normale, 370648, built on a Giulia Spider chassis delivered new in Kenya - no front fender indicators. (Look it up in Fusi, Page 841, note the 2 lines for Giulia Sprints and Giulia Spiders, Fusi got the designations wrong the first line on the Sprints should read 10102 and on the Spiders 10103 instead of 10112 and 10123...My copy of Fusi has lots of pencilled corrections)
Over the years many of us have leaned how to read all of this info and we can usually puzzle it out between us - each has their own niche, Bill Gillham, Dave Brohan, Andrew Watry, Stuart Passey, Dan Allen, Gordon Raymond to name a few and there are many others who are equally knowledgeable and who willingly help folks, that's what makes the Alfa Community, the BB and the Giulietta Register such great resources.