To watch collectors, the term “Frankenwatch” is pejorative, suggesting an impure timepiece cobbled together from parts of questionable origin and vintage. But ask those same collectors to name the best constituent parts from any watch and you’ll be in for a rousing debate, which will eventually produce an imaginary watch that only a mad doctor could love. So we decided to jump in, building a hypothetical watch made up of the best components from a number of watch companies. The criteria are fiercely subjective, and the resulting watch is an entirely ludicrous, unsightly mongrel no one would ever wear. Which just goes to show: a watch is more than the sum of its parts.
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Dial: Audemars Piguet Royal Oak Offshore Diver

The mesmerizing texture of AP’s Mega-Tapisserie dial, that perfectly symmetrical grid of lozenges, results from hours turning under the stylus of a pantograph machine. The tapisserie (literally “tapestry” in French) for which AP is known adds a three-dimensional elegance to what is often a two-dimensional component. It also tempers AP’s Royal Oak Offshore brutes with a level of refinement.
Case: Grand Seiko 44GS

You may be surprised to see a Japanese brand among the European Masters, but nobody builds cases as well as Grand Seiko, the high-end marque of the ubiquitous watch company. Drawing on a knife-making tradition that dates back to the samurai swords of centuries past, the Grand Seiko 44GS case is a study in understated perfection, all razor-sharp angles, perfect brushwork, polishing and tight tolerances.