Introduced at Baselworld 2012 back in March, the Omega Speedmaster Racing, is a more affordable version of the brand's Co-Axial Speedmaster.

Instead of utilizing Omega's new in-house manufacture Co-Axial caliber 9300 which we discussed here.The Speedmaster Racing is powered by exclusive self-winding chronograph movement - caliber 3300. Caliber 3300 is considerably more affordable than the 9300, yet it still features Omega's proprietary Co-Axial escapement with 3 levels, a Si14 silicon balance spring, NIVACHOC shock absorber and a column-wheel chronograph mechanism. It has 31 jewels, runs at 28,800 vph (4Hz) and a power-reserve of 52-hours. Moreover, it is an officially certified chronometer.

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Raymond Weil recently announced the new Nabucco Cuore Vivo chronograph with a dial cut-out that allows a view of the movement's going train, balance and escapement.

The round case is 46 mm x 15.85 mm and is made of matte titanium and polished steel, with a circular matte titanium and polished steel tachymeter bezel. Steel screwed-down crown fluted with RW logo and steel screwed down fluted pushers. The dial is galvanic black, with a central checkered motif pattern in the center. Applied luminescent indexes and 12 o'clock Arabic numeral with polished edges. Titanium counters at 3 o'clock (30-minute counter), at 6 o'clock (12-hour counter) and at 9 o'clock (small seconds). Visible balance and escapement wheels at 10 o'clock. Steel hour and minute hands with luminescent material. Blued steel bâton second hand with glossy finish and blued counter hands.

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At Baselworld 2012, Victorinox unveiled the redesigned Dive Master 500 collection.

The Dive Master 500 comes in either 38 mm or 43 mm diameter stainless steel cases - treated with either Black Ice of gold PVD. There are four 38 mm quartz models: black, burgundy, khaki green (with gold PVD coating) or white; two 43 mm quartz models in white or khaki green; and three 43 mm mechanical versions: grey, red or brown. The quartz models are powered by Swiss made Ronda 715.5 calibers and the self-winding models are powered by the ETA 2892-A2 caliber (automatic has clear case back).

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This is the Maurice de Mauriac Zurich Chronograph Modern in a 42 mm x 14 mm satin brushed finish titanium case. We previously reviewed a 45 mm diameter black DLC (Diamond Like Carbon) case variant here. The majority of Maurice de Mauriac timepieces come with beautiful satin brushed cases which are - both harder to finish than a typical brushed finish and easier to scratch. Nevertheless, I highly recommend the satin finish as it looks great even with scratches.

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Longines unveiled a number of interesting new vintage inspired timepieces at Baselworld 2012. We already showed you the Longines Heritage 1942 last week, and here is the Longines Heritage 1940. As its name suggests - it is based on a model from 1940. The round steel case is 38.5 mm in diameter with a lacquered dial (available in white or black) that features a railway-track minute ring and 11 Arabic numerals. The hands are of blued steel in the white-dial version and rhodium-plated in the black version.

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At Baselworld 2012, Longines revealed the vintage inspired Heritage 1942 chronograph collection.

The 40 mm diameter circular steel case houses a self-winding column-wheel chronograph movement. Vintage style round pushers are consistent with timepieces from the 1940s. The lacquered dial, available in white or black, features 9 Arabic numerals, a railway-track minute ring and a tachometric scale around the rim of the dial (white markings on the black dial and black on the white dial). The white-dial version has blued steel hands; the black dial version has rhodium-plated hands.

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Raymond Weil introduced the Freelancer Urban Black at Baselworld last month. It features a matte black PVD treated stainless steel case. Notably, the black coating is not typical PVD, it is anti-fingerprint PVD. The case, bezel and crown feature the special matte black PVD treatment. The case back has the same matte black finish, and a black tinted sapphire crystal. The case measures 42 mm x 13.7 mm and has anti-glare treatment on both sides of the sapphire crystal. The self-winding chronograph movement has 25 jewels, a frequency of 28,800 vph (4Hz) and a power-reserve of 46-hours. Functions include hours, minutes, small seconds, 3-day date/day and chronograph.

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While in Switzerland attending Baselworld last week, I was able to preview a number of very cool prototype wristwatches. Unfortunately, as of right now, I am only able communicate about one - the Maurice de Mauriac 300 M Diver. Shown above in a 45 mm stainless steel case coated with black PVD, the Mauriac 300 M Diver is powered by a top grade Valjoux 7750. It features locking pushers, screwed-in crown and screwed-in caseback for water-resistance of 300 meters. It will be available for purchase in the near future - in a variety of materials, finishes and dial designs. Like all Maurice de Mauriac pieces, it is all Swiss, assembled and precision adjusted in Zurich, Switzerland.

Editor's Note: This is a "prototype" - not available for sale - it will eventually meet the minimum ISO 6425 standards that require 100 meter water-resistance and a way to measure elapsed time, a dive bezel is currently in development.