I happen to know .olli. of this forum has experience with these and he does a jolly good job.
Here is a link
Hi All
Firstly many thanks for allowing me to join .
I'm in possession of a seiko bellmatic 4006 6011
But I'm having problems finding someone to service and possibly repair it.
Even seiko wont touch it !?
Waited along time to acquire this watch and really want it sorted out.
Can anyone help
I happen to know .olli. of this forum has experience with these and he does a jolly good job.
Here is a link
Give ALSAL Watches, 226 Strand, London a call, ask for Tim. He will be more than pleased to assist you.
Not sure if this will help, however more than 5 years ago (I moved away) I had several vintage Seiko's serviced/repaired by "John Steward of Swindon".
These included a 6138 and a 6139 amongst others. I'm not sure about a 4006 but suspect if he can deal with 6138/9 movements he can sort a 4006 out for you.
His prices are (were then) possibly cheaper than other places and the service is excellent.