Seiko 6105-8110 Service – Guest post by John

This is a guest post by John – you can visit his web site at

Today I started servicing an epic 6105-8110. The owner wanted a new crystal,dial, bezelinsert and hands.
I could convince him to keep it original, and only change the old crystal for a new sapphire.

Seiko 6105-8100 overhaul

Ready for the cleanup

Seiko 6105-8110

Movement back together, and ticking..

Seiko 6105-8110

Not bad. Liftangle was not set right, but later on it measured 210 degrees.

Seiko 6105-8110

Putting back together the dial side

Seiko 6105-8110

And the new crystal
Seiko 6105-8110
Seiko 6105-8110

Dial and hands….

Seiko 6105-8110
Seiko 6105-8110

Casing up

Seiko 6105-8110

Ready, wit a new sapphire

Seiko 6108-8110
Seiko 6105-8110

3 thoughts on “Seiko 6105-8110 Service – Guest post by John

  1. Hello john.

    I have a Seiko 6105-8110 serienumber 130539.

    I think its frome 1971/1974 ?

    I want the watch to keep original and only replace the glass fore Sapphire. And i think the watch needs a good glean up.

    Its not working but its compleet original.

    I live in the neatherland and hope you can help me with advise.

  2. Needs some lume pouring in to the hole at the top of the bezel, but apart from that the condition wouldn’t bother me at all; degraded glass does though!

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