lug2lug
BrowseCompareNewsCommunityMy Watches
BrowseCompareNewsCommunityMy Watches
Theme
Popular microbrands:Christopher Ward·Baltic·anOrdain·Atelier Wen·Boldr·Bremont·Dan Henry·DOXABrowse all →
Best, by the specs:Diver under $2,000·Dress under $5,000·Chronograph under $5,000·Sport under $5,000·GMT under $5,000·Field under $500·Pilot under $2,000·Casual under $1,000All rankings →
Glossary:Lug-to-Lug·Water Resistance·Chronograph·GMT·Automatic·LumeBrowse all →
Tools:Collection tracker·Wrist-fit calculator·What should I buy?·Value retention rankings·Market index·iPhone app
Lug2Letter
Watches worth knowing about, weekly.
Curated discoveries, founder spotlights, and the occasional deep-dive.
Get the app
Download on theApp StoreGET IT ONGoogle Play
TermsPrivacyCopyrightDisclosuresContactContribute

Independent reference site · not affiliated with any brand · contains affiliate links

© 2026 Lug2Lug LLC · Prices are estimates and not offers

Loading watch
Home/Browse/Tudor/North Flag
SpecStudio
Tudor North Flag
Click to inspect
Ask the communityStart a discussion about the North Flag — get takes from other collectors.Ask →
Tudor · North Flag

Tudor North Flag

Ref. M91210N-0001

Sold out
Buy from TudorFind used on eBay

Case

Diameter
40mm
Material
Stainless Steel
Finish
Satin-brushed
Water resistance
100m
Caseback
Sapphire crystal

Crystal & dial

Crystal
Sapphire
Dial colour
Black
Indices
Applied

Movement

Caliber
MT5621
Type
Automatic
Power reserve
70h
Hacking
No
Hand-winding
No
Complications
Time only

2 colorways

Alternatives

01The living market

This one moves.

From listings that closed on r/Watchexchange and WatchUSeek. Not appraisals or offers.

RetailNot listed

Nothing listed right now, and 2 closed in the last 30 days.

  • ·Asking and closing medians, each with the number of listings behind it
  • ·The weekly trend, on a real time scale
  • ·How long one takes to sell, from the listings that closed

Tudor on the secondhand market

Somewhere in +8.5% to +16.6%

38 matched watches

Year-by-year readings →

02The connection engine

More like this.

Milifortic Retro Military Sub-dial Dirty Dozen Auto Watch M060

Milifortic

Retro Military Sub-dial Dirty Dozen Auto Watch M060

39mm · Automatic$169

NIMA Watches NIMA GMT (NH34)

NIMA Watches

NIMA GMT (NH34)

39mm · Automatic$636

NIMA Watches GRAVEL TRAIL SHADOW

NIMA Watches

GRAVEL TRAIL SHADOW

39mm · Automatic$636

Ralf Tech ACADÉMIE AUTOMATIC

Ralf Tech

ACADÉMIE AUTOMATIC

41mm · Automatic$2,230

Bausele Royal Australian Engineers 125th Anniversary watch

Bausele

Royal Australian Engineers 125th Anniversary watch

38mm · Automatic$650

Nuncier N200 Titanium Gray V2 AR 40.5mm

Nuncier

N200 Titanium Gray V2 AR 40.5mm

40.5mm · Automatic$769

View all alternatives

03The community take

Owners talk.

“
In a nutshell

The Tudor North Flag (ref. M91210N-0001) is an automatic watch, with a 40mm stainless steel case, powered by the MT5621 movement and a 70-hour power reserve. Water resistance is rated to 100m, under a sapphire crystal.

Open the discussion

On real wrists

No shots yet. Show how it wears.

04The paper trail

05The discussion

Talk about the Tudor North Flag.