Movement

[RichardHarris123]

Anyone recognise this movement, dispite the dirt it's running well. 

[watchweasol]

looks like a BFG 866 . but no markings  google Ranfft BFG 866 for details.

[RichardHarris123]

4 minutes ago, watchweasol said:

looks like a BFG 866 . but no markings  google Ranfft BFG 866 for details.

Checked, looks the same to me.  Thanks.  Good, bad or indifferent movement? 

[RichardHarris123]

Just seen it's a pin lever, which is frowned upon. But still going strong. 

[watchweasol]

Yes they are old pin lever movemrnts but are very robust and were used in many afordable watches  in the 60s.  reliable old workers. Not a s classy as the jeweled lever ones but an example of th technology.

[Nucejoe]

Here is an excellent lesson by jon on this caliber. 

 

[RichardHarris123]

2 hours ago, Nucejoe said:

Here is an excellent lesson by jon on this caliber. 

 

Is there such a thing as a mini service.  I bought the watch for a future project and since it's running well I don't want to do a full service yet. 

[oldhippy]

You can't really cut corners. One thing I have done in the past if a watch has a dirty hairspring you can clean that by putting it in ronsonl lighter fluid to wash it and then oil the pivots but I don't recommend it. If the watch is dirty then it needs cleaning and oiling, if left it can cause wear which will then end in irreparable wear. 

[Nucejoe]

1 hour ago, RichardHarris123 said:

it's running well I don't want to do a full service yet. 

I just presumed you would want to service it, notice that hairspring coil is not centered, its likely to stick when worn. 

Regs

[RichardHarris123]

18 minutes ago, Nucejoe said:

I just presumed you would want to service it, notice that hairspring coil is not centered, its likely to stick when worn. 

Regs

What is the solution? 

[watchweasol]

As far as pin pallet watches go the BFG is probably the classic. As I said before it was used my multiple names as the bog standard movement . In my opinion no watch should be looked down upon but treated with the respect the technology deserves . Pin pallets were cheap in relation to the jeweled levers and the much derided Timex was frowned upon but in its own right it was an example of engineering and has many fans today

[watchweasol]

If the watch is running ok its best left alone at this point untill you need to service it as doing a half job on it is may cause problemnsi.     Attached is the sheet for the BFG 866.

2529_BFG 866,866.31.7 (3).pdf

[Nucejoe]

2 hours ago, RichardHarris123 said:

What is the solution? 

Bend the hairspring right after it leaves the stud to get the terminal curve parralel to the rest of the coil to have a concentric evenly breathing coil, level and flat as well. 

Like this

https://uploads.tapatalk-cdn.com/20180729/7befd83fedcdfb43dd5b01920111f015.jpg