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AS 1802 vs 1803 Hour Wheel

MikeRaleighNC
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MikeRaleighNC Member

MikeRaleighNC

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Hi all - I'm working on an AS (A Schild) 1803 movement. The hour wheel has a couple worn teeth that are slipping on the minute wheel. Seeking a replacement, I saw Jules Borel interchange said the hour wheel is interchangeable with that of the 1802. Everywhere I find hour wheel on the internet, they are labelled as AS 1802/03. However, they are different. In short, the 1803 is thicker so that it can catch the intermediate date change wheel. The wheel on the 1802 (non-date version) is thinner, and slides below the date change intermediate wheel (not engaging).

Am I missing something? Trying to confirm these parts are, indeed, not interchangeable. In any event, if anyone has an 1803 hour wheel, I cannot find one! See pictures, and thanks in advance.

20200515_131200.jpg

20200515_131219.jpg

20200515_131302.jpg

rogart63 Distinguished Member

rogart63

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1950 has that kind like the left . Sure it isn't from a 1950 . The 1950 is a no date. Therefore lower then the 1802. Or even a 1800/01 

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MikeRaleighNC Member

MikeRaleighNC

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3 minutes ago, rogart63 said:

1950 has that kind like the left . Sure it isn't from a 1950 . The 1950 is a no date. Therefore lower then the 1802. Or even a 1800/01 

Thanks for the reply. Yeah, the no dates are likely all the same. Given the part (#255) is often referenced as interchangeable, I was trying to validate that they are indeed NOT interchangeable or whether there is some trick/method to swap one for the other...

HSL Distinguished Member

HSL

Posted
Posted

Yes it's just a matter of looking if it is a date or no date version,I also took a look since this is based on the ST (Standard) movement which other had the same one, seems to be a bunch to choose from.

CaseCaliber Factory Number:AS 1902 255 Hour wheel
AS 1060
AS 1710
AS 1712
AS 1800
AS 1801
AS 1802
AS 1803
AS 1900
AS 1902
AS 1940
AS 1941
AS 1950
AS 1951
AS 2062
AS 2072
AS 2160
AS 2162
ELG 314
ELG 960
ELG 973
ELG 996
GIR 132
GP 142
STA 1800
STA 1802
ZOD 65

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