Marius LeCoultre, a watchmaker and retailer located in Geneva, founded his own company in 1848. He specialized in unusual and high quality watches, developed a retrograde date system and was awarded an honourable mention during the Geneva Chronometer Contest in 1887. At the Chicago Universal Exhibition in 1893 he exhibited complicated and precision timepieces.
The complexity and high quality of the present watch combined with the fact that calendar indications are in English lead to the conclusion that this watch might have been one of the exhibits in Chicago.
Another particularity are the day and month indications for which LeCoultre used four letters instead of the more common three letter abbreviations.
For another LeCoultre watch with retrograde date display see lot 79 in this auction.