[TR] TR- non tr

[Greg Tatarian]

The definition of NOS has been interpreted differently over the years. 
Wikipedia provides one definition as "old parts for obsolete equipment 
that have never been sold at retail", (Barron's Educational Series).
For car parts, nowadays it appears to mean New, Old Stock from the 
original equipment manufacturer, even if it was relabled and marketed 
under a different brand, which happened frequently with imported British 
and European cars in the past (think Beck Arnley, Repco). The NOS term 
has also previously been used to describe any period-manufactured part, 
whether OEM or not, but as time has passed, people are looking for more 
specificity.
A part made by another manufacturer as a replacement part during the 
same production period as the vehicle and/or new OEM parts is now more 
commonly called New, Old Replacement Stock. If your timing chain was 
made by Stanpart, it would be NOS.
Parts made in recent years are called Replacement Parts. If your timing 
chain was made by another manufacturer in recent years, it would 
therefore be referred to as a Replacement Part.
Don't count on using an original part number unless you have the 
cross-reference books, as many numbers changed over the years, for 
various reasons.
There does seem to be some ambiguity in these terms, so I expect that 
there will be others with different definitions. These are how I 
understand them.
Cheers,
Greg Tatarian



L1J1S at aol.com wrote:
> list, what is the true definition of NOS?. I purchased a part ten years ago 
>  from a vender. the part is still in the original plastic bag, unopened. 
> can this  part be put under the classification of NOS? or is there another 
> term that  should be applied to a ten year old new part? and finally, for a 
> original part  from the days back, what would that be called?  larry  schwartz
>
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