1909 Tiffany & co Pocket/Pendant watch with Logines mechanism 18K

[Eldar]

Hi all,
I’ve scooped this on a local auction now I’m dying to know it’s worth.
Any help will be appreciated!
Here are the details I have :
Brand: Longines, Tiffany

Style: Antique

Type: Pendant watch

Dial Markings: Tiffany & Co. Switzerland

Bezel Material: 18K Yellow Gold

Caseback Material: 18K Yellow Gold

Movement: 11.62N, 15 Jewels

Estimated Production Year: 1909

Markings on Back: LBH (Initials)

Markings to Inside: 18K Made For Tiffany & Co. By The Longines Watch Co. Switzerland 3593407
DIMENSIONS

- case to case 27.80 mm.

- 44.60 mm bale top to bottom.

- ligne size 11.

- the total approximate weight, inclusive of all materials, is 12.80 dwt.