The watch will come in three varieties - the entry level "Sports" model, the mid-tier "Apple Watch" and the upper end "Apple Watch Edition" which the company says will be made of 18k (75% pure) gold and is estimated to retail from anywhere between $4,000 and $10,000.

Apple (APPL) have ordered their manufacturing plants in Asia to produce between 5 and 6 million units. Around half of these will be the Sports model which is expected to retail for $349.

Around one third of the order will be made up of the mid-range watch leaving an estimated one sixth of the order to be comprised of the gold edition.

Tidbits, the independent blog discussing all things Apple have estimated that each watch will use 2 ounces of gold.

While this may be an over-estimation - a watch made of 75% gold would be be quite bulky if it used a full two ounces - it is not impossible, especially if buyers were to opt for a gold bracelet with the watch.

Apple's reported expectation to shift one million units of the Edition model will be a tall order. In the end it will probably come down to the price. Even at the lower end estimate of $4,000 it's hard to imagine Apple shifting one million units each month.

However, Apple's ability to generate a buzz or hype, depending on your perspective, cannot be under-estimated.

While details concerning the actual function of the Watch do not suggest a "must-have" motivation for buying it - at least on technological grounds - Apple raving fans may create the massive demand the company expects.

It does not have the element of indispensable usefulness that one could associate with the iPhone or iPad. The major attraction of the ‘Watch’ will be a fashionable one and be about being part of the Apple ‘tribe.’