Here's the pertinent parts about the Record front derailleur changing to Super Record (no holes to four holes to three holes) from the Campagnolo Timeline (http://www.velo-retro.com)
1978 -- CPSC mandates changes to NR/SR. Included are a front derailleur lip, 2.5 mm increase in spacing between crank spider and arm (to clear the front derailleur lip) with corresponding increase in bottom bracket axle length, a curved quick release lever and ball-end added to quick release conical adjuster, dome-shape added to quick release cam lever on brake calipers, and plastic safety-piece on rear derailleur screws. 1979 -- Catalog #17a Supplement is printed for the year-end trade shows. Introduced are a revised Super Record derailleur with script logo and different cage geometry, single bolt Super Record seat post, Record front derailleur with four holes (later to be three) in cage, straight-band clamp (later to revert to traditional pointed-band clamp), short Nuovo Record dropouts without eyelets, chain holder with accompanying control lever and trigger, and fixing shoe-plate for pedals. 1980 -- Development starts on the Campagnolo freewheel, a combination of aluminum, titanium, and steel with a three-pawl rachet system. It was originally a floating, two-pawl design, then a floating three-pawl, and finally a fixed three-pawl design for production. (It's presumed the floating-pawl design was too difficult to service). The last project that Tullio personally oversaw. The 980 low-cost rear derailleur is introduced. 1982 -- Olympic Catalog is printed for the year-end trade shows. The Campagnolo freewheel is introduced along with the Super Record front derailleur with black anodized arms, three holes and brazed-on fitting option, the HiLo Record rear hub (reputed to be originally custom-made for the West German Olympic Team in 1972), toe clips in both steel and alloy versions, the second version of the titanium axle bottom bracked (solid instead of hollow, with nuts rather than bolts), the 980 rear derailleur (project started in September 1980?), and BMX crankset (gold, blue, or silver anodizing), pedal (gold, blue or black), and large or small hubs (gold, blue or silver). Also, a series of promotional items are offered; corkscrew, nutcracker, a limited edition belt buckle set, an Olympic lapel pin set, a folding, disposable razor, a travel bag, and various Campagnolo window and frame stickers.