The Omega Speedmaster, a name synonymous with space exploration and horological excellence, boasts a rich and diverse lineage. Within this prestigious family, the Speedmaster Date, specifically the references utilizing the Calibre 1151 movement (often referenced as 3513.50, 3513.30.00, and similar variations), holds a unique position. This article delves into the intricacies of the Omega Speedmaster Date 3513, exploring its specifications, historical context, market trends, and price fluctuations, offering a comprehensive review for both collectors and prospective buyers. We'll examine the nuances separating models like the Omega Speedmaster 3513.50 and the Omega Speedmaster 3513.30.00, clarifying the often-confusing nomenclature surrounding this popular series.
Model Specifications and Variations: Decoding the 3513
The Omega Speedmaster Date 3513, powered by the automatic Calibre 1151, represents a departure from the purely chronograph-focused Speedmasters. The addition of a date complication adds a touch of everyday practicality to the robust design, making it a versatile watch suitable for both formal and informal occasions. While the reference numbers often cause confusion, a key understanding helps clarify the differences:
* Omega Speedmaster 3513.50: This is arguably the most common reference number encountered. It generally refers to models with a stainless steel case, a black or silver dial, and the iconic Speedmaster hands and indices. Minor variations within this reference exist, primarily in dial color and bracelet options (e.g., bracelet vs. leather strap).
* Omega Speedmaster 3513.30.00: This reference number often denotes variations with slightly different dial configurations or potentially minor case variations. The core movement and functionality remain consistent with the 3513.50, but subtle differences in aesthetic details might exist. Determining precise differences often requires close examination of specific examples. The "00" at the end of the reference number often signals a particular variation within the broader 3513 family.
* Omega 3513.50.00: Similar to the 3513.30.00, this reference likely represents a specific variation within the broader 3513.50 range. Without detailed documentation or images, definitively distinguishing these subtle variations proves challenging.
* Speedmaster 3513.50: This is simply an abbreviated reference, identical in meaning to the Omega Speedmaster 3513.50.
The Calibre 1151, at the heart of these watches, is an automatic movement known for its reliability and smooth operation. While not a chronograph movement like its Speedmaster brethren (e.g., the legendary Calibre 321 or the modern Calibre 9900), it provides accurate timekeeping and the added convenience of an automatic winding mechanism. Its robust construction ensures durability, aligning with the Speedmaster's reputation for resilience. Key specifications generally include:
* Movement: Calibre 1151, automatic
* Power Reserve: Approximately 44 hours
* Functions: Hours, minutes, seconds, date
* Case Material: Primarily stainless steel
* Case Size: Typically around 39mm in diameter
* Water Resistance: Generally 50 meters (165 feet)
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