Smartphones that can tell the time in 40 different timezones are causing watches to become ancient relics, but, you can show your affection for the retro timekeepers of your childhood with these four watches that are unlike any other.

Casio Databank

First on the holodeck is the classic Casio Databank, which pairs a timeless frame that houses ten digits and four functions to a silicon band.

The databank is able to tell you the time and the tip, but the lack of a backlight or indiglo system will leave you in the dark once the sun sets.

The sexy CA53W also features dual-time and an alarm, as well as a chronograph in the unlikely event that you need to record your lap times.

The watch retails for $25, but can be found online for just $15—making it a no brainer for mathletes.

Watchismo Click

Watchmiso’s original Click watch ditches the standard plain casing found on most watches in favor of printed circuit board and steel, and replaces ordinary buttons with old school toggle switches.

The Click watch can output time in the standard hour:minute format, but if you’re feeling especially nostalgic, you can activate the bar graph metered time display with the literal flip of a dip.

The Click watch is $150, but you can’t put a price on the satisfaction of having raw hardware on your wrist.

Click KeyPad

The Click KeyPad watch is bulky, awkward, and to be perfectly honest, does a pretty bad job at telling time. But, the incredibly unique (yet familiar) design makes it the ultimate geeky accessory.

The face of the watch—if you can even call it that—is a ten digit number pad, and when a key is pressed, individual LEDs on each number light up in order to tell you the time.

It’s a perfect fit for the rare accountant with a sense of humor, or anyone who remembers the golden years of clicky keyboards.

The Click KeyPad will run you $90, although it’s a small price to pay for all those chicks you’ll inevitably pick up.

Nixie Tube Watch

Ah, the nixie tube watch. As seen on Steve Wozniak himself, the nixie watch from Cathode Corner is the only sure-fire way to establish your geek cred in the dark, seedy underbelly of inner city hackerspaces.

When you tilt the retro timepiece at a 45 degree angle, the cathode tubes glow red in the neon gas, illuminating the time in true 1960′s fashion.

The costly $395 price tag will weed out any hipsters, but this watch is the closest you’ll get to reliving the early days of modern computing—short of carrying around a mini punch-card machine.

Do you know anyone sporting a geekier watch than these? Leave a comment and tell us what it is!