30's vintage watch mens Zenith lépine windingcrown at 12 cal. 12''' RARE

From 30's this rare and unusual Zenith model with recessed winding crown placed between the lugs above 12 o’clock. Such positioning not only provides practical protection to the crown from knocks, equipped with movement manual wind 12 line calibe with neck swan regulator produced in 1919/20, however only later (30s) equipped this model, the explanation is given by "Marc Roethlisberger (a former zenith employee during 40 years)

He said: " the movements with number 2.4 million are from the twenties
but at that time started a big recession in the watch business and the
movements produced in 1919 , as this, were stocked waiting for
better time, what happened in 1936 ! For information all movements
12''' with number 1469511 - 2470567 produced in 1919 were put on the
market in 1936 .

Case:
o   Metal chromed serial 8130227 with evident marks and scratches all over
o   29.5mm without crown / 41mm lug to lug  / 10.3mm tickness /  15mm lug width
o  New generic plexiglass

Movement:
o    Mechanical manual wind zenith 12''' -  serviced by watchmaker on March 2023
(movement was disassembled, washed, lubricated) - photo of timegrapher
although this service has been carried out, the regulation is not the best and it is advancing by approximately 1/1.5minute a day. We wanted to preserve its originality as much as possible, so no parts were exchanged. Sold in this working condition.

Dial & Hands:
o Untouched with evident signs of aging, radium preserved

Bracelet Material:
o New 15mm black leather with generic buckle

Conclusion / Condition:
Opportunity to acquire a very collectible zenith due to its rarity and unusual shape, this is a collector's item not for everyday use

please see photos as they are part of the description.
No box or pappers, no water proof test, sold as is, any question feel free for ask...