ToniT
5
From my understanding and my experience...
All the "corninos" (the first 1675) had glossy dial, small arrow hand and 1560 movement (circa 1959).
From 1962 till mid 66 the "standard" case replaces the "cornino" one but keeping the glossy dial and small hand.
From mid 66 the new 1570 movement replaces the previous one (1570), keeping the glossy dial but changing to the big arrow hand.
From the end of 1967 the matte dial replaces the glossy, that the config till the end of the 1675 at the beginning of 80ies.
So, in my opinion:
+ No cornino has big 24h hand
+ A glossy or gilt dial in a non-cornino case can be with small or big 24h hand (in 1966 or 1967)
+ No matte has a small hand
But this is just my opinion...
Hope this helps 
Question to all who know
One question for you: On the Rolex 1675, what is the year where Rolex changed the small arrow on the 24 hours hand for the big one? The small arrow: The big arrow: Did some 1675 big arrow come with the gilt dial? I gathered some controversial informations...
No easy answer...
Nicolas, I have a 1966 1675 gilt dial with big GMT hand which I feel is original due to the very matching patina. But the cut off point for the switch will be difficult to determine! Best, Anatol...
Well, I thought that 1967 was the switch point, to say all.
So, you tend to confirm what I thought I knew. But, as you said, no easy answer, as I saw some which came in 68. And I have some doubts.... As often, when it comes to Rollex Vintage, there are many more exceptions than rules... Let's see what the others t...
Did you try Veroplastica resource?
Hi Nicolas, I've been told that most of the GMT had a large arrow hand from 66-67. Did you try to find more details on the Veroplastica resource? Best,
Thanks, Edouard...I'm doing my homework
And I'm trying to gather some informations, and to check them... Best, Nicolas
I have in my records...
...a couple of 1966 GMT's with small arrows that look original. We must be close to the transition here... My personal thumb rule would be to associate a small arrow GMT hand with a gilt dial. More or less ;-) Cheers Jeff
Ok for small GMT hand and gilt dial
But what about big GMT Hand and Gilt dial??? I also saw some '66 small GMT hands. I'm a bit lost. Best, Nicolas
Personaly...
I would not like a 1675 with a gilt dial (pre 1967) and a big GMT hand. It makes pretty much sense to me that Rolex changed the style of the arrow hand when they changed the style of dial. Just my 0.02 cts....and most of the time it is very hard to determ...
Yep, Bill
If there is one certain thing, it is that the Big GMT hand came on all matt dials with white letterings. Damn, you have 2 GMTs??? You're worst than me, my friend. Nicolas
From my understanding and my experience...
All the "corninos" (the first 1675) had glossy dial, small arrow hand and 1560 movement (circa 1959). From 1962 till mid 66 the "standard" case replaces the "cornino" one but keeping the glossy dial and small hand. From mid 66 the new 1570 movement replac...
That makes pretty much sense...
and is consistent with about everyone's observations. Thanks for your contribution. Cheers Jeff
That makes sense.
Thanks a lt for these clear explanations, and welcome here, by the way. Best, Nicolas
My pleasure...
Thanks for the welcome Nicolas. Long time lurker but new poster Best Toni
Sharing your knoweldge for your first post was much appreciated, Toni.
I hope to hear more often from you, now that you joined the " Famiglia "... Best, Nicolas
A pleasure see you here, Toni...
Best, my friend. Emilio PS: your 5513 is keeping good time here, in Alicante
Hola Emilio!!!
Following Nicolas advise I will try to post more often here, not just reading but contributing.... all of you seems to have a good home here ! Glad your 5513 keeps good time in Alicante, at least it can compensate the bad weather
No lo habia entendido antes
Pues, ahora si! You're the former owner of Emilio's 5513! The friends of my friends are my ...Hermanos! Best, Nicolas
The "Famiglia" is increasing, Hermano!
Yes, my dear Nicolas, Toni was the former owner (before the seller on our Collector´s Market) of the beauty in my wrist. I bought it because I know it was one of his daily beaters and because his great tastes. I´m happy seeing Toni here. A good boy with l...
I see, Emilio...
La famila crece para mi mayor placer! Un abrazo, y que disfrutes de tu Rolex! Nicolas
It´ll be a pleasure reading you here, my friend.
Yes, I think that you must follow Nico´s advice, and try to post here more often. And you have true too when you say that we have good home here... well, good no, the best home. I have great friends here, Toni, the friendship in Purist is one of it&#...
Sorry, can't get your point...
In fact there are 1,1M corninos, they were produced from the end of 1959 till beginnig of 1962 aprox which means that you can find it between 0,5 up to 1,2 more or less. Maybe I explained myself wrong in my previous post. Best T
mmmmmmmm
I think ser# tells us when it was produced, i never saw square crown guards before ser. 1.1Mln. Do you think thhey produced that all before 1960? I don't think so... or did you work in Rolex those years???