Rado Ref 603

[pratama]

does anyone know what movement this rado uses?




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[scottjc]

Strangely I can only find that reference on Russian sites, not even on Rado.com.
The information I could find says that it has an ETA A05.H21 movement which has a power reserve of 54 hours.

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[Henry Krinkle]

The base calibre of the ETA A05.H21 is the Valjoux 7750. The date hole is in an odd place. It is at 3 normally, but it is the only ETA calibre that otherwise fits with the specs and that 6,9, 12 dial configuration that I know of other than the 7750 itself, which also has the date at 3.

[Henry Krinkle]

I believe the movement was originally developed for Hamilton, so it should be an affordable/mid level solidly reliable cam chronograph.

[Henry Krinkle]

This movement is available in 25 and 27 jewel variants. Here is a pic of a 27j version.

[scottjc]

A shame they didn't use the seconds hand at 9 like on the original Valjoux 7750 chronograph. That would have been a suitable nod to the past.

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[pratama]

thanks for the explanation


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