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| Date/Report
Number …..060109.TYHJY60G70.06 Item: WALTHAM MILITARY US 1917 H WITH 17 JEWEL WALTHAM 6/0 D PARKERIZED
CASE |
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Description of item: VINTAGE
WALTHAM MILITARY US 1917 H WITH 17 JEWEL WALTHAM 6/0 D MOVEMENT IN A PARKERIZED STAINLESS
STEEL WATERPROOF CASE WITH G-18 NATO STYLE DESERT SAND NYLON STRAP
WITH KEEPERS CASE IS 31.46 X 41.55 MM, CASE SIGNED STAR WATCH CASE CO STAINLESS STEEL
2389176
7192108
Estimated Retail Replacement Value $699.00 |
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| Reports are supplied at the request of the customer
and it is for the customer's exclusive use. Reports express an opinion of the time of the
examination of the jewelry. This report is for customers use only for the following two
purposes, indicating estimated retail replacement value to obtain insurance coverage, or
for the purpose of providing geological information. GoldSmith Works does not guarantee
that the appraisal valuation will result in a sale at the price. Estimated retail
replacement value is arrived after analyses of what the approximate high retail cash
asking price is for labor, materials, and design. These prices may be substantially higher
than actual transaction or warranty with regards to any item described in the report,
since jewelry grading is not an exact science, this report represent the best
opinion of the company. GoldSmith Works is in no case responsible for differences that
occur by repeated grading by other experts in the field and/or use of other standards,
norms, methods or criteria other than those used by GoldSmith Works. GoldSmith Works is
expressly held harmless by customers including, but with out limitation for any claims or
actions that may arise out of negligence in connection with the preparation of this
laboratory report, or actions based upon the customer's use of the report. The information
on the carat weight, clarity grade, color grade on the report is approximate due to the
limitations in jewelry grading. The item was tested, graded, and examined under 10x
magnification using the techniques and equipment available to GoldSmith Works, including
fully corrected triplet loupe, binocular microscope, master color comparison guides,
diamond color comparison tools, electronic carat balance, non-contact optical measuring
device, and ancillary instruments necessary at the time of Examination. |
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PARKERIZING
The terms Parkerizing, Parkerize, and Parkerized are
all technically registered U.S. trademarks of Henkel Adhesives Technologies, although the
terminology has largely passed into generic usage for many years. The process was first
used on a large scale in the manufacture of firearms for the United States military during
World War II.
Parkerizing (also called phosphating and phosphatizing) is a
method of protecting a steel surface from corrosion and increasing its resistance to wear
through the application of an electrochemical phosphate conversion coating. Parkerizing is
usually considered to be an improved zinc or manganese phosphating process, and not to be
an improved iron phosphating process, although some use the term parkerizing as a generic
term for applying phosphating (or phosphatizing) coatings that does include the iron
phosphating process.
Parkerizing is commonly used on firearms as a more effective alternative to bluing, which
is another electrochemical conversion coating that was developed earlier.
The Parkerizing process cannot be used on non-ferrous metals such as aluminum, brass, or
copper. It similarly cannot be applied to steels containing a large amount of nickel, or
on stainless steel. Passivation can be used for protecting other metals.
The process involves submerging the metal part into a phosphoric
acid solution whose key ingredient is often zinc or manganese, with varying additional
amounts of nitrates and chlorates and copper. In one of the many processes that have been
developed, the solution is heated to a temperature of 190–210 °F (88–99 °C)
for a period ranging between 5 and 45 minutes. A stream of small bubbles is emitted from
the metal part as the process takes place; when the bubbling stops, the process is
complete. In addition to this particular processing temperature, there have also been
various similar Parkerizing processes developed and patented that permit using either
lower temperatures (for energy efficiency) or higher temperatures (for faster processing).
Zinc phosphating results in a non-reflective, light- to
medium-gray finish. Manganese phosphating produces a medium- to dark-gray or black finish.
Iron phosphating produces a black or dark gray finish similar to manganese phosphating.
The grain size of the zinc phosphating is usually the smallest among the three processes,
providing a more appealing cosmetic appearance in many applications. Many firearms that
are Parkerized turn to a light greenish-gray color within a few years, as the coating
ages, with the protective coating remaining intact. Cosmoline, especially, interacting
with Parkerizing, can cause the highly-desired and attractive greenish-gray patina to
develop on firearms that are stored in armories.
Manganese and iron phosphating coatings are usually the thickest electrochemical
conversion coatings, being thicker than electrochemical conversion coatings such as zinc
phosphating and bluing.
None of the electrochemical conversion coating finishes are painted coatings, but
chemically become part and parcel of the metal surface to which they are applied.
As for all electrochemical conversion coatings, the Parkerized surface must be completely
covered with a light coating of oil to maximize corrosion and wear resistance, primarily
through reducing wetting action and galvanic action. A heavy oil coating is unnecessary
and undesirable for achieving a positive grip on Parkerized metal parts.
Alternatively, the Parkerized surface may be painted over with an epoxy or molybdenum
finish for added wear resistance and self-lubricating properties.
DIAL CASE CROWN CRYSTAL
CASE IS 31.46 X 41.55 MM
PARKERIZED STEEL
WATERPROOF CASE
THE THROUGH HOLES
ALLOW THE USE OF PINS
IF A SPRING BAR WAS LOST
RELUMINATED
VINTAGE WATCH
THE NATO STYLE
G-18 NYLON STRAP
WITH KEEPERS
LOOKS PERFECT
WITH THE COLORS OF THE DIAL
AND IS CLOSE TO THE COLOR
OF THOSE WATCHES WORN
BY SOLDIERS
IN NORTH AFRICA
IN WWII
THE
U.S.
1917 H
IS NOT THE
YEAR
OF THE WATCH
IT IS
THE MODEL
STAR WATCH CASE CO
STAINLESS STEEL
2389176
7192108
Features
stem wind and set
sub second
4 ADJ
Data
6/0 size, Do= 25.4mm, Dm= 24.7mm
H= 3.85mm
17 jewels
f = 18000 A/h
power reserve 34h
