My updated timeline (including your comments)

1930s - World War II
1931	4th March - Reverso patented
1932	JLC prepared it’s first set of movements for the model, one of which was the caliber 410. These watch movements were considered as the JLC’s own in-house movements.
1937 – 1938	Sale of first Reverso, since viewed as the 'Original'.
1950s - 1970s
Widely considered as a 'limbo period' where JLC used old stocks of material to produce the Reverso. It was also omitted from advertising during this time.
Early 1970s	According to myth, Giorgio Corvo Italian JLC distributor and watch collector discovered a small number of Reverso cases during a visit to the JLC workshop in Switzerland. These cases were then fitted with movements, and sold in Italy, which led to it’s immediate success.
1980s - 1990
In this period suffered an identity crisis, the Reverso was redesigned and tweaked from the original case size, offering various rectangular shaped Reverso, the face was also altered to include Roman numeral dials.
1983	50th anniversary: Wider launch of the Reverso
1984	First water resistant Reverso.
1991 - 2009
1991	60th anniversary: Limited edition of 500 pieces, considered as adding a new dynamic to the Reverso collection.
1993	Launch of the Reverso Tourbillon.
1994	Luanch of Reverso Duoface (one dial on each side).
1994	Launch of the Reverso Minute Repeater.
1996	Introduction of the enamel workshop.
1996	Launch of the Reverso Chronographe Retrograde.
1998	Launch of the Reverso Geographique.
1998	Introduction of the Reverso pocket watch, discontinued in 2002.
2000c	Launch of the Gran Sport Chronograph. First Reverso with an automatic watch movement.
2001	70^th anniversary: Reverso Septantième', limited to 500 pieces, made of platinum. Launched in 2002.
2002	Introduction of the XGT case, Reverso were known for being 'oversized' in keeping with watch trends of that time.
2006	75th anniversary: Reverso Squadra, a square face, thicker in depth, leading to the incorporation of further watch complications.
2006	JLC released a limited edition, the Grande Complication à Triptyque (three dials, all powered by a single movement), it was branded as the most complicated Reverso ever built.
2009 - Present day
2009	Launch of the time-only Reverso 976 and dual-time Reverso 986.
2009	Launch of the Reverso Minute Repeater à Rideau.
2011	80th anniversary: Launch of the Grande Reverso Ultra Thin Tribute to 1931.
2016	85th anniversary: Launch of three Reversos: Tribute Duo (two faces), Reverso Tribute Calendar (two faces with a calendar function) and the Reverso Tribute Gyrotourbillon.

A Reverso Timeline

By: Dr_Nav : November 16th, 2016-12:49

Hi all, I haven't posted on the site for some time and alot has changed since I last visited (completed by doctorate, got married and moved to another city)! I've been researching the Reverso and it's amazing history for some time now! I've researching th...

Slight corrrection, if memory serves...

By: watchme : November 16th, 2016-13:14

1:15pm, March 4, 1931 - Reverso Patented by Rene-Alfred Chauvot. First movements were Tavanes movements (affiliated with CYMA). 1932 First Reverso with Caliber 410 1932 10 cases delivered to PP (JLC was a primary supplier of movements to them at the time)...

Here a pic of the patent

By: Alkiro1 : November 16th, 2016-13:25

Best wishes Alkiro ...

I would add the following ones...

By: amanico : November 16th, 2016-22:54

1993: Reverso Tourbillon. 1994: Reverso Minute Repeater. 1996: Reverso Chronographe Retrograde. 1998: Reverso Geographique. 2000: Reverso Perpetual Calendar. The Septantieme was announced in 2002, but issued in 2002. 2009: Reverso Minute Repeater à Rideau...

Thanks!

By: Dr_Nav : November 17th, 2016-00:36

Good morning all, Thanks all for the updates and additional information! Also I was reading that JLC recognise that the Reverso collection has become complex, and they will be, if they haven't already cutting back on their collection! Thanks again! Nav

They already did it, this year. [nt]

By: amanico : November 18th, 2016-01:23

In term of movement...

By: eklektik : November 17th, 2016-12:31

... the introduction on automatic movements has to be mentioned in my opinion. The first automatic movement was introduced on the squadra if I remember well and was considered revolutionary. After that, a more conventionally looking model came out (rather...

Naah, the first automatic movement was introduced with the Reverso Gran Sport Automatique

By: amanico : November 17th, 2016-23:05

In the early 2000's. Cal 960R. Best, Nicolas

Thanks for the correction! The Gran Sport is another variant of Reverso not mentioned in the first post. Best, É [nt]

By: eklektik : November 18th, 2016-01:10

Yes! [nt]

By: amanico : November 18th, 2016-01:23

Thank you.

By: Dr_Nav : November 24th, 2016-05:18

Thanks all, I've updated my table to include the Gran Sport- I am writing a research paper on brand authenticity using the JLC Reverso as an example of how they have maintained and at times saturated authenticity throughout the 85th history of the brand!

QQ

By: Dr_Nav : November 24th, 2016-05:14

hello -thanks for this. Quick question: was the automatic movement first introduced in 2006 for the 65th anniversary?

No, first introduced in the Gran Sport Automatic. Early 2000's. [nt]

By: amanico : November 24th, 2016-05:29

My updated timeline (including your comments)

By: Dr_Nav : November 24th, 2016-06:59

1930s - World War II 1931 4th March - Reverso patented 1932 JLC prepared it’s first set of movements for the model, one of which was the caliber 410. These watch movements were considered as the JLC’s own in-house movements. 1937 – 1938 Sale of first Reve...