Hamazawa Ltd movement

[stuart]

I recently bought a 7549-7010 which had been modified with a different movement but came with all the original parts too. One of the movements that came with the watch is a Hamazawa Ltd Y513A 2 jewel movement.

The actual metal parts from the movement are a 7546, but the plastic top is from Hamazawa. Seems kind of weird that the plastic part with the electronics would fit directly onto a Seiko 7546 movement.

Does anyone know if this is a common modification as a quick google search brings up quite a few examples of Seikos with these fitted.

[Adrian-VTA]

They were a OEM movement manufacturer that was absorbed into SUWA Seikosha in 1986.

They made the movements for a bunch of "Swiss but not Swiss" brands and some of the lesser known Japanese brands e.g. URIKA in the 70's. They probably became a subsidiary of SEIKO at some point in the late 70's before they were absorbed. So I'd say your movement was license built for brands that wanted a good quartz movement that didn't say SEIKO on it.

This is before the SII/TMI days.

[dnill]

What Adrian said. I have one as well, and the branding on my movement is Pulsar. Simply a Pulsar Y513 movement.
These movements is a direct drop-in fit to the 7546/7548 seiko models.

/David

[stuart]

Thanks for the info.

I'm not a keen quartz fan but its always handy to have a spare working movement. Unfortunately the 7549 movement which came with the watch seems to be toast so a recently serviced 7548 movement will be taking its place. One great thing with these movements is the interchangeability of parts 

[28A]

What's wrong with the 7549? You could always convert the 7548 to a 7549 using the parts on hand. Spencer did a write up on it a while ago.

[28A]

I'd be interested in the 7549 movement and hands if you'd like to sell them.

[stuart]

Dec 29, 2015 20:20:50 GMT -8 28A said:

What's wrong with the 7549? You could always convert the 7548 to a 7549 using the parts on hand. Spencer did a write up on it a while ago.

I think it must be the chip which is build into the green plastic part. I swapped the green plastic part to a working 7546 and it didnt work. I havent really looked at it much but the 7549 movement does have some water damage by the looks of things so I'm guessing this is the cause. Also a couple of parts are missing from it so I think its going to be a donor movement and not a runner.

I'll be swapping around a few movements between watches until I get some setups I'm happy with but if I dont have a requirement for the 7549 parts then I'll certainly let you know.