↑21.4%eBay asking prices. Condition and box/papers status not filtered.
Up 21% over the past 90 days
Based on eBay sales, last 12 months
Condition affects price
Pre-owned watches trade across a wide condition spectrum. These ranges are typical for the secondary market.
New Old Stock
Unworn example retaining original packaging, tags, and warranty documentation.
$334–$386
+30–50% vs median
Unpolished
Worn but the case has never been polished; original brushed and polished surfaces are intact.
$296–$321
+15–25% vs median
Polished
Case has been professionally or amateur polished at some point; edge definition is softened.
$218–$244
-15 to -5% vs median
Recently Serviced
Movement has been recently serviced with documented service records; case condition varies.
$257
At median
BLOCKED: The BN0191 runs the E168 Eco-Drive, a quartz solar movement. GrailWatch catalog policy excludes all quartz watches. This reference should not be added to the catalog.
What it is
N/A , quartz exclusion applies. See catalog_policy_gimmick_watches.md in project memory: "Quartz excluded entirely; mechanical analog only."
Buying notes
N/A
Market read
N/A
Service expectations
N/A
Editorial copy is AI-drafted from primary sources and reviewed by Grail Atlas before publication. Where the text is uncertain about a fact, it says so. Email corrections@grailatlas.com if something reads wrong. Signals on this page (community, OSINT) are clearly separated from the editorial sections.
Entry-tier movement · caliber Citizen Cal. E168 -- Eco-Drive light-powered, no battery, 28,800bph equivalent quartz accuracy; used in Promaster Marine BN0191; solar-powered non-mechanical movement
Large case: suits wrists 7 in+ (18 cm+)
47 mm case. A bold, statement-size wear. Best suited to larger wrists where the case sits flush.
Not yet rated
Community + OSINT signals haven’t landed for this reference yet. We don’t publish a rating against zero signal — the number would mean nothing. Editorial body + caliber + market value still surface above; ratings appear once the signal corpus does.
Eco-Drive charging behavior is the primary functional test; a failed capacitor needs service, not replacement.
Known issues in the market
Eco-Drive that does not charge in bright light has a failed capacitor; replaceable at Citizen service.
E168 caseback designator confirms Eco-Drive; any battery-powered variant is incorrect.
Area
What to check
What is correct
Red flag
caseback
Eco-Drive E168 designation
E168 caliber designation confirming Eco-Drive light-powered movement
Battery-powered caliber designation; non-Eco-Drive movement installed
dial
Eco-Drive solar cell texture
Slight translucency or texture in dial from solar cell beneath
Fully opaque dial with no solar cell characteristic; standard battery watch converted to Eco-Drive case
movement
Charging behavior
2 minutes in bright light provides several days of running; normal capacitor function
Fails to charge after bright light exposure; capacitor failure requiring service
Authentication guide
Last reviewed June 2026
The Promaster Marine BN0191 is an ISO 6425-certified dive watch powered by Citizen Cal. E168, an Eco-Drive light-powered solar movement. It is not mechanical. The titanium case and ISO certification marking on the caseback are primary authenticity checkpoints. There is no winding crown; the watch charges via ambient light.
Known reproduction risks
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LOW
The Promaster Marine is not a high-value replica target. The Eco-Drive movement and titanium case specification are hard to fake economically.
Crown with winding resistance (wrong movement type)
Steel case where titanium is specified (noticeably heavier for its size)
Missing ISO certification marking on caseback
Dial variants by era
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Era
Description
Identifiers
2018 to present
Black or blue dial. Large applied luminous markers. "CITIZEN ECO-DRIVE" at 12 below the logo. "PROMASTER" text on dial. Unidirectional rotating bezel with aluminum insert. 47mm case in titanium.
"ECO-DRIVE" on dial confirms solar-powered movement
No crown for winding; the only crown is for time-setting (and rotates freely without building resistance)
Titanium case: lighter than steel, with a matte brushed finish
"ISO 6425" or dive certification may appear on dial or caseback
Screw-down crown despite not being a winding crown; required for water resistance integrity
Service part flags
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Movement
Original: Citizen Cal. E168 Eco-Drive, light-powered with no battery that needs replacement. The power reserve display (if present) shows the remaining charge state.
Replacement tells
A mechanical movement in this case is not the BN0191
Any ticking pattern other than the Eco-Drive quartz tick (one per second, precise and even) indicates a replaced movement
Case material
Original: Titanium case, noticeably lighter than steel for its size. The brushed finish has a slightly warmer matte tone than brushed steel.
Replacement tells
A heavy case claiming to be titanium should be weighed; titanium is approximately 40% lighter than steel of the same volume
A case with a cooler silver tone typical of polished steel may not be titanium
Case back markings
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2018 to present
"CITIZEN ECO-DRIVE" on caseback
"ISO 6425" certification marking
"PROMASTER" on caseback
"200M WATER RESISTANT"
Reference BN0191-80L and serial
"JAPAN MADE"
Titanium symbol or "Ti" marking
Movement tells
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The E168 Eco-Drive requires light exposure to charge. A watch stored in darkness for several months may need 10 to 20 hours of light exposure to resume full function. This is not a defect.
If the second hand jumps in two-second intervals instead of one-second intervals, the watch is in power-saving mode and the charge level is low. Expose to bright light.
The crown rotates without building resistance in any position. This is correct for an Eco-Drive; if the crown builds winding resistance, a mechanical movement has been installed.
