At 42 mm, the Streamliner's cushion-shaped stainless steel case pairs a polished steel bezel with a domed sapphire crystal and a see-through sapphire caseback, while a folding clasp with push-buttons secures the integrated stainless steel bracelet. Water resistance reaches 12 ATM, and the case measures a slim 12.1 mm in estimated thickness — a considered proportion for the complexity housed within.
The Blackor Fumé dial presents a charcoal-to-black gradient that deepens from center to edge, serving as a composed canvas for the perpetual calendar display. Moser distills the complication to its essentials: a central hand tracks the months against the twelve hour markers, a date window sits at 4 o'clock, and a power reserve indicator at 10 o'clock completes the layout — no redundant subdials, no cluttered typography.
The hand-wound HMC 812 manufacture calibre delivers an instantaneous perpetual calendar alongside hours and minutes, and its 168-hour power reserve means a full week of autonomy between windings. Reference 6812-1200, individual number 200131828, is offered in unworn condition.
