When did A1 wipers change to 500844

[w30bob]

Hi Guys,

Wondering if it is known when (by SN) the wiper motors went from the 7375189 to the 500844? I did find Wes' post that said;

M38 and A1 uses 2 Trico 63527 Ord 7375189 (have the manual handle. There was a later around 1955 supersedure for one without the manual handle Ord 500844.

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Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

I haven't found much more on the subject. My A1 is a '55 and I have a pair of both wiper motors, so just wondering which to install.

thanks,
bob