The dimensions are 0.05 mm thick by 6.3 mm wide and 4.5 cm long.  Also, 
there are three holes at each end, the space between the central holes 
is 2.3 cm.  It looks kind of like this:             000          000

Hope this helps.
Dick

meredith lamb wrote:
> Hi Chris,
>
> Excellent!
>
> The two separate masses weigh a total of 20 pounds.  The absolute 
> maximum width of the spring allowed within the
> clamp is 0.311"; it could obviously contain a smaller width ~ 0.25", 
> for much easier insertion/replacement.
>
> As a possible material prelude; I do have 0.007", and 0.014" thick 
> phosphor bronze shim roll stock.  I also have
> 0.010" thick blue tempered hardened steel spring shim roll stock.  All 
> old but never used.  All would need cutting
> down and cut edge filing deburring to fit the flat clamp size 
> firmly/easily; all the spring widths are more than 0.311". 
>
> Take care, Meredith
>
>
>
>  
>
> On Wed, Aug 20, 2008 at 8:17 AM,  > wrote:
>
>     In a message dated 2008/08/20, dwebb002@.............
>      writes:
>
>>     I have a few pieces of the original and will measure the width and
>>     thickness as soon as I find a micrometer.  I can attest that they
>>     are
>>     rather fragile.  I don't know the composition but they have a brassy
>>     appearance.
>>     Dick
>
>
>     Hi Dick, James , Meredith,
>
>            If you can give me the seismic mass and the maximum width
>     of the clamp strip, we can work out the thickness required quite
>     easily. The wire was almost certainly a repair.
>            It is very unlikely to be brass, but it could well be
>     bronze or phosphor bronze strip. You might also consider a SS
>     replacement?
>
>            Regards,
>
>            Chris Chapman 
>
>
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