5513 caseback/Serial question

[Chad M]

5513 has a caseback IV70 (1970) and a 4.7m serial (1976)...Original owner who I've known for 35yrs (only had one service in 2007)

Any info on how the dates can conflict like this?

He also thinks he purchased it in 1970...

[mignonp13]

Hi,
4.7m serial is for a service case


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[Chad M]

Originally Posted by mignonp13

Hi,
4.7m serial is for a service case


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I see, so a service case issued in the early 2000's possibly?

[mignonp13]

Yes surely during 2007 service… unfortunately


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[springer]

Service case.

[Tools]

Originally Posted by Chad M

I see, so a service case issued in the early 2000's possibly?

Impossible to know because service numbers were used across many years.

Both 4.4M, and 4.7M are well known, but there could be others. I have not seen anybody uncover the latest random serial service case numbers, but they are out there.