Аugust Ericsson pocket detent chronometer original Borgel case 1894

Description

Аugust Еriсssоn keyless chronometer spring detent pocket watch №200 ~1894
Original solid silver case by early François Borgel.
Rare caliber (probably made exclusively for Ericsson) featuring even more rare high-grade finishing version.
Regularly, these Ericsson calibers appear without jeweled centre staff, without chatons and without sapphire jewel on balance top (scroll down for a pic from Dr Crott catalog).
Condition
:
NOT WORKING currently. As found - something wrong with mainspring. Balance spins freely and contacts the going wheel; rest parts seem good as well.
Never polished
case as I conclude from lovely external patina and bright shiny internals.
Perfect signed enamel dial
All original untouched condition (originally I bought this watch in  Japan at antique shop within Fukuoka prefecture. During Russian-Japanese war of 1904-1905 Fukuoka was one of three main concentration camps for Russian prisoners. There is no direct proofs currently but quite likely the watch may have been belonged to one of high-ranking marine captives. The monogram has 'E T' initials).
Free worldwide EMS shipping
(~ 7-10 days to US via USPS Priority Mail Express Int.)
(~ 7-12 days to UK via Parcelforce GlobalPriority; same time - most of EU countries; same time - Switzerland, Norway)
(~4-8 days to France)
(~7-14 days to Canada)
(~7 days to China, Hong Kong, Japan, South Korea, Taiwan, Malaysia, most of Asia)
(~7-14 days to Australia, New Zealand)
etc
Please make me know if need an assistance considering item value.
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