When a watchmaker claims that it can only build one of its most complicated timepieces every year, and that it will only be producing six of that model in total, you can safely assume you’ll be digging deep in your pockets for the privilege of strapping one to your wrist. Such is the case with the A. Lange & Söhne Grand Complication. Debuting in 2013 but based on a pocketwatch designed and built back in 1902, the Grand Complication is assembled from 876 parts and includes features like chimes on the quarter hour, dials on the face for the time and date, and an advanced chronograph that can keep track of two splits at the same time: a rare feature among mechanical time keepers that may or may not help justify its $2.3 million price tag.

It’s not uncommon for watch enthusiasts to also be gear heads, given the similar complexity of motorized vehicles like cars and motorcycles. Watchmaker Azimuth, inspired by the classic film Easy Rider, put two and two together and came up with the SP-1 Crazy Rider, which features a literal drive train wrapped around a pair of sprockets that actually turn in unison. These carry a hand that moves along a series of 24 numbers to indicate the current hour, while a more traditional spinning hand indicates the minutes. It’s unique and functional, and at $5,200, may not completely bankrupt a collector.

At a quick glance, you wouldn’t be wrong to assume this were an Apple Watch with an upgraded strap in the middle of a software update, but it’s actually a mechanical watch designed to poke fun at Apple’s wearable. Inside the H. Moser Swiss Alp Watch Final Upgrade is the company’s Calibre HMC 324 movement, which promises 96 hours of time-keeping between windings, but on the front is a minimalist face covered in the same light-absorbing Vantablack paint that once caused an unfortunate museum visitor to fall into an eight foot hole.

It gives the Swiss Alp Watch Final Upgrade the appearance of having an OLED display, an illusion which is further reinforced with a spinning ‘thinking’ icon that runs indefinitely, even though the timepiece doesn’t have software upgrades. It’s a fun alternative to the distractions of a smartwatch, with better ‘battery’ life, but at $30,800, is far less affordable.

A smart watch with a high-res screen can recreate the appearance of almost any kind of display imaginable, including the classic split-flap screens once used at airports and train stations around the world to indicate departure and arrival times. But seeing the split flap effect on a watch is more impressive when it’s real and recreates the unique mechanics behind those types of displays. That’s what the Jacob & Co. Epic SF24 brings to wrists, with a second time zone option featuring a scrollable list of cities and a split flap numerical display indicating the current hour elsewhere in the world. Since it’s so small, the watch doesn’t recreate the unique sound of hundreds of flaps adjusting at the same time, which might be a bit disappointing if you drop $68,000 on this piece.

Designed for the pocket instead of the wrist, the Caliber 89 debuted in 1989, after nine years of development, to help celebrate the 50th anniversary of watchmaker Patek Philippe. Just four were ever manufactured, each made from a different precious metal (yellow gold, white gold, rose gold, and platinum) but the limited availability was also due to the complexity of the timepiece. The Caliber 89 weighed in at 2.5 pounds and featured 1,728 components that included 24 moving hands, a thermometer, and even a star chart. When it debuted in 1989, it was the most complicated mechanical watch to date: a distinction it held for 26 years.

It featured 33 complications, which are features that don’t involve displaying the time, and with a price tag of around $5 million each, it’s hard to imagine the Caliber 89 ever actually being stuffed into a pocket.

At its peak, the Roman empire spread far across Europe, even well into Switzerland, where relics from a town called Aventicum (now a Swiss city called Avenches) included a gold bust of Marcus Aurelius found perfectly preserved inside a pipe. That discovery was the inspiration for Christophe Claret’s Aveticum, which features a clever hologram in the middle of its face surrounded by Roman numerals and hands that run around its outer edge. The watch features a Mirascope—a set of convex mirrors placed atop each other—which makes a three millimeter bust of Aurelius appear to float above the watch’s face when viewed from certain angles. It’s a neat trick, and one that will set you back around $50,000.