SONA/CITIZEN

[berniethebolt]

does anyone know which citizen model the hmt sona is based?

[jdm]

You have asked this already

https://www.watchrepairtalk.com/topic/7466-hmt/

If no answer there, why posting again.

 

[Marc]

33 minutes ago, berniethebolt said:

does anyone know which citizen model the hmt sona is based?

I don't think that HMT based any of their watch models on any Citizen models as such.

However, I do know that HMT used the Citizen Cal:0201, made under licence and re-branded, in a lot of their 17J manual wind watches.

Post a pic of the movement and I may be able to identify it.

[berniethebolt]

OK Marc reason i am posting this question again,i had a slight accident with the cannon pinion attachment pictured (forgot the exact name,still learning,).it got caught in my movement holder spring! and so i need a replacement.Thanks B.

[berniethebolt]

On 04/12/2017 at 7:14 PM, Marc said:

I don't think that HMT based any of their watch models on any Citizen models as such.

However, I do know that HMT used the Citizen Cal:0201, made under licence and re-branded, in a lot of their 17J manual wind watches.

Post a pic of the movement and I may be able to identify it.

OK MARC.DID YOU GET MY PHOTOS?

[Marc]

Bernie,

comparing your pics with my own Ciitizen 0201 it looks as though there are some minor differences in the shape of the plates and machined recesses, but all the key reference points look the same.

These are Citizen 0201 for comparison;

The part you are after is the hour wheel. If you measure the dimensions of yours I can tell you how they compare with the Citizen.

[berniethebolt]

HI Marc it seems to be 6mm diameter and the pipe? 1mmx1mm.thats as close as i could get as my digital vernier is on the blink.Bernie.

[berniethebolt]

16 minutes ago, berniethebolt said:

HI Marc it seems to be 6mm diameter and the pipe? 1mmx1mm.thats as close as i could get as my digital vernier is on the blink.Bernie.

just noticed the keyless works look a little different!

[Marc]

OK, I'm not sure that the hour wheels are interchangable then. On my Citizen 0201's the hour wheel is 6.55mm diameter (32 teeth), with a 1.53mm OD pipe, 1.27mm tall. I have also just opened up my HMT Jawan which does have the HMT version of the 0201 movement and the plates are identical to the Citizen, so I'm not at all sure.

As for the keyless works, have you had them apart? It looks to me that the parts I've edged in blue might be in upside down. If you flip them over and add the missing parts I think they will look the same.

 

Slightly clearer

Edited December 15, 2017 by Marc
clearer pic

[Marc]

ok, this link shows a HMT movement with the same shape plates as yours;

http://jayprashanth.blogspot.co.uk/2008/02/indian-mechanical-watches.html

and identifies it as a HMT 0231

Ranfft;

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&2&2uswk&HMT_0231

says that the 0231 is a copy of the Citizen 1802 BUT.... the pic he shows has the same shape plates as my 0201, and the dial side is totally different, so somewhat confusing.

one posibility is that HMT used different shaped plates at different times for the same calibre and it is a 0201, can you remeasure your hour wheel, make sure that the calipers are properly zeroed first just to be sure.

One thing that Ranfft does say is that the cal number may be on the case back. Also have a good look over the main plate and make sure that there are no numbers there.

[berniethebolt]

OK,ON THE CASE BACK IT DOES SAY 0231.i get around 6.40 dia.the other meas.are similar but like i said my calipers are playing up.as for the keyless works you are probably right as i copied the routine off my phone camera,so that can be soon sorted.thanks for that.the hour wheel would probably have had 32 teeth before i sheared them off as i counted the remainder and the gap would allow for those missing!B.