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The Rolex Submariner
As
the Rolex Submariner celebrates its 50th anniversary, we can trace it roots back
to the very first waterproof Rolex Oyster. However, the appearance of the model
6204 Submariner in 1954, signaled the dawn of what we have come to identify as
the ultimate sports tool watch.
The Rolex 6204 was fitted with a Rolex caliber A296 semi-bubbleback automatic
movement and was waterproof to 600 ft. This model was followed by the 6200 and
the 6205.
In 1957, these models gave way to the Submariner models 6538 and 6536/1, which
also had the new caliber 1030 movement and a larger case and better crown, which
boosted the depth rating to 660 ft for the 6538, but dropped the 6536/1 to 330
ft.
Cont'd
Chinese porcelain
This six part article is concerned with the porcelain wares
of China, from early times until the present day. In scope
it covers a wide range of Chinese high-fired ceramics, some
of which would probably not be recognized as porcelain under
some Western definitions of that term.
Chinese porcelain is usually green-fired or once-fired,
which means that the body and the glaze are fired together.
After the body of a piece is formed and finished it is
air-dried, coated with a glaze, dried again and fired. In
the high temperature of the kiln the body and the glaze are
fused together to become a unit. Chinese enameled wares are
also produced in this way, but the enamels are added after
the first, high-temperature, firing and the pieces are sent
for a second firing in a smaller, lower-temperature kiln.
Suitably modified with a flux, the material used to form the
body of a piece of Chinese porcelain was often used as a
glaze. The similarity in composition of the body and the
glaze helped to produce a good fit between the two that
reduced cracking in the glaze.
Cont'd
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