The owner of a yet undiscovered Ref. 6152/1 “Marina Militare”, based in Italy, has contacted us recently to provide some information about his watch, which we added into our database. The case number (1247XX) of the watch is inbetween the number of today existing 6152/1 watches. So, one more “piece of the puzzle” is added – our database is permanently growing.

You can find more information about Ref. 6152/1 watches in our 2nd book “Vintage Panerai – The References” in chapter IV, pages 202-255.

An example of our classification work: The reference 3646 is divided into seven production groups (Type A – Type G), different caseback markings and numbers are important indicators.

The illustration shows the following caseback versions:
Ref. 3646 / Type D Brevetee Rolex S.A.
Ref. 3646 / Type E (plain / only number)
Ref. 3646 / Type F Brevetee Rolex S.A.
Ref. 3646 / Type G (plain / only number)

You can read and see more about the different versions of Ref. 3646 watches in our book “The References” 1930’s-1940’s. Find the illustrations of  ref. 3646 / Type A – Type C casebacks here.

Since January 1st, 2010 we have received more than 40 new entries in our database, spread over all references. Most of the new entries are in the reference 6152/1.

Very interesting for our research is a “group” of three Ref. 6152/1 watches in a row: 124805, 124806 and 124807.

The first two watches have both “Luminor Panerai” dials. Watch 124805 has a crown protecting device signed “10”, while its “brother watch” 124806 has the crown protecting device signed “9”. It will be interesting to compare these two watches with close lower numbers to see if they have crown protecting devices signed with matching numbers (between “1” and “8”) to them.

All three watches come with the –  typical for this reference – Rolex Cal. 618 / Type 4 movement (17 Rubis + Incabloc shock protection) which is one of the main features of Ref. 6152/1 watches with Rolex movements.

Both watches with “Luminor Panerai” dials have the “double pencil” hands, but they are not 100% identical: watch 124806 has the “sharp pin” versions, watch 124805 has the “dull pin” versions. Both watches, 124805 and 124806, have no matriculation number engraved on the caseback.

Watch 124807 comes with a “Marina Militare” dial and so it could be part of a different order, in case that the Italian Navy ordered watches with identical dial inscriptions from Panerai. This question can be answered in the future when we have found more watches which have close case numbers to these three here. 

Watch 124807 has the crown protecting device signed “7” and the “BREV. ITAL.” trademark inscriptions. The caseback of this watch bears a matriculation number: “M.M. 005”. It holds also the “double pencil” hands with “sharp pins”.

You can find more information about Ref. 6152/1 watches in our 2nd book “Vintage Panerai – The References” in chapter IV, pages 202-255.

Everytime we get the chance to take a close look at a rare Ref. 6152 Panerai, we can’t resist to make a very close observation of its case profile, which is – compared to Ref. 6152/1 case profile – very different. During the X Club Panerai Meeting in Viareggio there was another chance to take a close look at a collector’s stunning Ref. 6152 watch (see illustration on the left).

Both references were delivered with 8 mm Rolex crowns, but the main feature of the better known (and more produced) Ref. 6152/1 is the Panerai crown protecting device. For many collectors it is difficult to understand the difference between a Ref. 6152 and a Ref. 6152/1 if they only see photos of both references.

If you ever have the chance to hold a Ref. 6152 Panerai watch in your hand: you must see and feel the small hollow and the slope (pink colored in the illustration) on the side of the case. If you compare it with the rounded case profile of a 6152/1, the difference is very clear and easy to spot.

You can read more about the Ref. 6152 Panerai in chapter II of our 2nd book “Vintage Panerai – The References” with detailled dimensions and supporting photos, comparing all three 615X references and their differences.

The references produced in the 1950’s and 1960’s show clearly differences in caseback markings. Beside the different shapes of center cases and lugs between 6152, 6154 and 6152/1, different Rolex markings are visible when caseback removed.

The illustration shows the following caseback versions:
Ref. 6152 Rolex (with case number)
Ref. 6154 Montres Rolex S.A. (with case number)
Ref. 6152/1 Montres Rolex S.A. (without case number)

You can read and see more about the different versions of Ref. 615X watches in our book “The References”.

An example of our classification work: The reference 3646 is divided into seven production groups (Type A – Type G), of which the different caseback markings and numbers (inside) are just one of the most important indicators.

The illustration shows the following caseback versions:
Ref. 3646 / Type A Oyster Watch Co (large)
Ref. 3646 / Type B Oyster Watch Co (small)
Ref. 3646 / Type C Brevetee Rolex S.A.

You can read and see more about the different versions of Ref. 3646 watches in our 2nd book ““The References” 1930’s-1940’s.

Recently we added another Ref. 3646 / Type B watch into our database.
It expands the number group of today existing Type B watches from 1010015 to 1010024.

Typical features of Ref. 3646 / Type B watches are the small “Oyster Watch Co” stamp in the inner caseback and the Rolex Cal. 618 / Type 1 movement.

Research in vintage watches is boring? Absolutely not! This week we got three new entries in our database, so three more pieces of the puzzle added. All of them are Ref. 6152/1 watches with Rolex movements, two with “Marina Militare” dial and one with “Luminor Panerai” dial. They all match with our database structure, which confirms its functionality during our research since years.