The Twin .... in many forms...
Dual Professional (pre-tweed 1950?-1952?) 25w - the first 2x12 Fender amplifier, all Twins after this were 2x12
Wide Panel Twin (1953-1955) 25w
Narrow Panel Twin (1955-1957) 45w - commonly called "the low power twin"
Narrow Panel Twin (1958-1960) 80w - commonly called "the high power twin" (or big twin, for its larger cabinet)
Blonde Twin (1960-1963) 80w - vibrato is now a built in feature, the face panel is brown
transitional White Twin (1963) - a blonde Twin with a black face panel and white (light creme) knobs - very rare
Blackface Twin Reverb (1963-1967) 80w familiar blackface with skirted/numbered black knobs, reverb added
Silverface Twin Reverb (1968-1982) 80w, then 100w, then 105w, then 135w These got progressively higher wattage, although the 80 and 100 watt versions are the same - Fender fibbed in the watt-wars days. The 135w version uses the Ultra-Linear output transformer, highly modified power supply... good for clean, terrible for all else. In 1972, a master volume was added, and in 1974, the Twin Reverb got a push/pull master volume (higher gain effect).
That was the end of the classic Twin line, until they came out with reissue Twin Reverb (same as blackface, modern construction), "The Twin" (called the evil Twin, a 2x12 100w amp with better high gain and tone modeling than the original, has channel switching too), and the blonde custom shop Dual Professional, a take on the Twin Reverb with some added tweaks, better reverb, etc.
In the middle somplace - the dreaded "avoid like the plague" Twin, Twin Reverb, Twin Amp and all others with red knobs.