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MorningTundra · 22 July 2018, 08:14 AM

I’ve seen this description used widely but what is it exactly? Is it a brand, model, nickname?

Top hat, dome, super dome but tropic?

Sent from my cracked, broken hand wound phone. IG @morning_tundra

springer · 22 July 2018, 08:32 AM

Without cyclops.

MorningTundra · 22 July 2018, 08:34 AM

Quote:

Originally Posted by springer

Without cyclops.

Enlightened... Thank you !

Any idea where the name comes from? “Without Cyclops” would seem to be more... sensible 🤨

Sent from my cracked, broken hand wound phone. IG @morning_tundra

themaninblack · 22 July 2018, 09:11 AM

I thought it was somehow related to the curvature of the earth as at the tropic north and tropic south, cancer and capricorn. Just imagery.

Tools · 22 July 2018, 09:24 AM

And then there are 16's, 17's 19's, and so on, and Domes and Super Domes

not to be confused with tropical dials....

roh123 · 22 July 2018, 07:16 PM

I just think it is what they were called. Tropic 19 (t19) and tropic 127 (t127) are names of the different plastic crystals. Regardless of shape and style.

R.W.T. · 24 July 2018, 03:42 AM

That's an official Rolex Term. Unlike many of the other terms we use...that one is the actual Rolex designation for crystals that are fit over a flange on the case and sandwiched between that and the bezel withOUT a magnifier. The magnifier crystals are designated also officially by Rolex as Cyclops.

wheelnut · 26 January 2023, 08:55 AM

Topic resurrection....
I've been considering this question in another topic and posted this as a possible reason. Happy to be corrected.
"I'm wondering if in past decades the non cyclops was thought a necessity in tropical or hot regions so the cyclops did not concentrate the intense sunlight and cause damage to the dial?
Just an uninformed thought."

springer · 26 January 2023, 10:25 AM

Quote:

Originally Posted by wheelnut

Topic resurrection....
I've been considering this question in another topic and posted this as a possible reason. Happy to be corrected.
"I'm wondering if in past decades the non cyclops was thought a necessity in tropical or hot regions so the cyclops did not concentrate the intense sunlight and cause damage to the dial?
Just an uninformed thought."

Sure, works for me.

22 July 2018, 08:14 AM	#1
MorningTundra "TRF" Member Join Date: Apr 2016 Real Name: Morningtundra Location: USA, UK & HKG Posts: 1,037	What is a “Tropic” crystal? I’ve seen this description used widely but what is it exactly? Is it a brand, model, nickname? Top hat, dome, super dome but tropic? Sent from my cracked, broken hand wound phone. IG @morning_tundra

22 July 2018, 08:32 AM	#2
springer 2024 Pledge Member Join Date: Apr 2008 Real Name: jP Location: Texas Watch: GMT-MASTER Posts: 17,197	Without cyclops. __________________ Member of NAWCC since 1990. INSTAGRAM USER NAME: SPRINGERJFP Visit my Instagram page to view some of the finest vintage GMTs anywhere - as well as other vintage classics.

22 July 2018, 09:24 AM	#5
Tools TRF Moderator & 2024 DATE-JUST41 Patron Join Date: May 2007 Real Name: Larry Location: Mojave Desert Watch: GMT's Posts: 43,049	And then there are 16's, 17's 19's, and so on, and Domes and Super Domes not to be confused with tropical dials.... __________________ (Chill ... It's just a watch Forum.....) NAWCC Member

22 July 2018, 07:16 PM	#6
roh123 "TRF" Member Join Date: Jun 2010 Real Name: Per Location: Sweden Watch: Gilt Rolex Posts: 2,946	I just think it is what they were called. Tropic 19 (t19) and tropic 127 (t127) are names of the different plastic crystals. Regardless of shape and style. __________________ Instagram: @perj123

22 July 2018, 09:11 AM	#4
themaninblack "TRF" Member Join Date: Sep 2014 Location: Australia Posts: 1,058	I thought it was somehow related to the curvature of the earth as at the tropic north and tropic south, cancer and capricorn. Just imagery.

24 July 2018, 03:42 AM	#7
R.W.T. "TRF" Member Join Date: Feb 2014 Location: Central Texas Posts: 1,973	That's an official Rolex Term. Unlike many of the other terms we use...that one is the actual Rolex designation for crystals that are fit over a flange on the case and sandwiched between that and the bezel withOUT a magnifier. The magnifier crystals are designated also officially by Rolex as Cyclops.

26 January 2023, 08:55 AM	#8
wheelnut "TRF" Member Join Date: Sep 2010 Location: UK Posts: 126	Topic resurrection.... I've been considering this question in another topic and posted this as a possible reason. Happy to be corrected. "I'm wondering if in past decades the non cyclops was thought a necessity in tropical or hot regions so the cyclops did not concentrate the intense sunlight and cause damage to the dial? Just an uninformed thought."

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