Seiko 7A38 - by the numbers

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Forum Home > Parts Info, Tech Tips and Tinkering > 7A38-7190 Two-Tone Part Number Information ?

Jonas
Member
Posts: 7

Hello,

A couple of questions from another newbie. :)

I could not spot a 7A38-7190 specific thread in this forum so I'm starting a new one.

As I understand Seiko Oceania is missing data on the 7A38-7190 silver dial (or grey according to Seiko) two tone case model.

Perhaps - SAA054J? Anyone has something more on this model and willing to share?

Also I assume the crown must be the same as for gold-tone 45M74NA1. Am I right? And does this mean 4.5 mm diameter crown?

Thank you.

Jonas.


March 21, 2017 at 6:42 PM Flag Quote & Reply

Seiko7A38
Site Owner
Posts: 12380

Hi, Jonas.

Yes, the two-tone 7A38-7190, which I've always assumed is the 'missing' SAA054J is one of those few odd 7A38 models absent from Seiko Oceania's database. Though if you're familiar with the watch, it's not difficult to interpolate parts data from other related models, like the 7A38-7180, other 7A38-7190's and the two-tone 7A38-727x's which share the same lozenge shaped watch case.


As to your specific enquiry: Yes, the crown would be p/n 45M74NA1.

Just do a reverse look-up (ask 'where used') to see where else it's used - lots of other 7A38's. And it is 4.5mm diameter. ;)

Couple of other significant part numbers worth mentioning:

The dial is p/n 710LXN18 - same as used in the two-tone 7A38-7280 SAA120J.

The bracelet is p/n B1412C (by extrapolation from the p/n B1412D used on the 7A38-7180). 8)


March 21, 2017 at 7:37 PM Flag Quote & Reply

Jonas
Member
Posts: 7

Paul, thanks for the quick response.

Well, to me the crown looks smaller than 4.5mm. Or it may be the wrong one installed.

Other question about the crown. What do the next digits stand for? I could only find 45M76NA1 available currently.


March 22, 2017 at 3:56 AM Flag Quote & Reply

Seiko7A38
Site Owner
Posts: 12380

Jonas.

Compare it to the crown on your gold-tone 7A38-7260, which uses the same part number. ;)

This is all the information I have on crown part numbers - extract from an old Seiko datasheet:




You probably could use p/n 45M76NA1 as a substitute, but there is still stock of p/n 45M74NA1 available, if you're prepared to do a little legwork. Try googling the part number. Plus Seiko Oceania show them in stock.


March 22, 2017 at 6:10 AM Flag Quote & Reply

Jonas
Member
Posts: 7

I already google a little. Not many results. Only stsupplyonline.com seems to have it.

Does Seiko Oceania deal with individuals?

March 22, 2017 at 6:44 AM Flag Quote & Reply

Seiko7A38
Site Owner
Posts: 12380

No they don't, unfortunately, Jonas - nor do any other Seiko service centres. :(

I used to purchase via Smith & Smith in Sydney, but they ceased trading at the end of November 2015.*

I recently emailed Seiko NSW and they recommended this company, but I personally haven't dealt with them yet. :/


http://www.australianwatchclocksupplies.com.au/




*See last sentence in the linked article.


March 22, 2017 at 7:18 AM Flag Quote & Reply

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