PRODUCT DESCRIPTION & FEATURES
This Sturmanskie Open Space Heritage 3105/1881917 is a men’s mechanical wristwatch from the “Open Space” collection, inspired by the first human spacewalk performed by Alexei Leonov (Voskhod 2 mission). The model features a stainless steel case and a skeletonized dial design exposing the mechanical movement.
Series: Open Space Heritage
Model: 3105/1881917 Skeleton
MOVEMENT
Movement: Poljot 3105 mechanical hand-wound movement
Shock Resistance: Standard mechanical shock protection
Frequency: 21,600 vibrations per hour
Power Reserve: ~42 hours
Calendar: No date function
Winding: Manual winding
CASE & BUILD
Case Material: Stainless steel
Case Shape: Round
Case Size: 42 mm
Case Thickness: ~12 mm
Case Back: Transparent exhibition caseback
Weight: ~70–90 g
Band Type: Strap
Band Material: Genuine leather
Lug Width: 20 mm
CRYSTAL & DIAL
Crystal: Mineral glass (domed)
Dial Type: Skeleton (open-work design)
Luminescence: Not specified
BEZEL & FUNCTIONS
Functions: Hours, minutes, small seconds
Bezel: Fixed
PROTECTION & RESISTANCE
Water Resistance: 50 m / 5 ATM
USAGE & CARE
Mechanical hand-wound watch designed for everyday wear and collector use. Requires daily winding. Avoid magnetic fields, shocks, and water exposure beyond WR50 rating.
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