Peter Hertel Master Watchmaker

German Watch Service in Chiang Mai

Master Certificate

About me

I was born on 08 April 1958, the son of a watchmaking family in Bad Langensalza. After school, I completed an apprenticeship as a computer and typewriter mechanic. After graduation, I began my training as a watchmaker and then acquired the championship title. Later, I took over my father's watchmaking company. There I deal with the sale of watches and jewelery and the repair of complicated watches. During my many years of work, I have gained a lot of experience. Some time ago, I relocated from Germany to Thailand and am now working for you in Chiang Mai, more precisely in the Doi Saket district. I have found that there is a large community of watch enthusiasts here in Chiang Mai who own quality Swiss watches and want them taken care of. I have had a number of Omega, Rolex, Patek Philippe, Jaeger LeCoultre, Roamer, Tag Heuer and so on watches repaired here. If you have a valuable watch that needs repair, please contact me. A high-quality mechanical watch would like to be cleaned and repaired by an experienced watchmaker after 5 to 8 years. Her precious, beloved watch is in good hands with me. Also visit my gallery. There I put together some repair reports and pictures.

Gallery menu

In this gallery, you'll see a small selection of repair work I've done and documented lately. For a closer look, please click on a selection field.

Repair Laco Sport men's watch automatic

Repair Omega men's watch caliber 651

Nordmende Rigoletto tubular radio from the 50

Repair of a tube radio from the 50s

Repair and modification Men's Watch Panerai Radiomir High Level Replication

Patek Philippe Calatrava 18 CT Gold Automatic Kal 28-255 Watch Repair and Restoration

Patek Philippe Calatrava 18 CT Gold Automatic Kal 28-255 Repair and Restoration

Rolex men's watch automatic DateJust 16200 caliber 3135 repair and service

Repair of a table clock with escapement and striking mechanism from the beginning of 1900

American pocket watch Waltham Mass circa 1920

American Pocket Watch Waltham Mass Repair and Service

Replica Watch Panerai Submersible Automatic 300m / 1000ft

Panerai Submersible Automatic 300m/1000ft Replica Repair and Service

Replica Watch Audemars Piguet Royal Oak Offshore

Audemars Piguet Royal Oak Offshore Replica Repair and Service

Rolex men's watch automatic DateJust 16200 caliber 3135 repair and service

I got this beautiful Rolex DateJust men's automatic wristwatch trustingly for repair. The owner told me he had been wearing this watch for 15 years. After opening, you can clearly see that 15 years has been too long. The clockwork looks totally worn out and the rotor has no more guidance.

The plant was completely dismantled and all parts checked. The rotor pin had to be replaced. Not an easy thing in 2020, as the whole world lies on the ground because of the Covid 19 virus. Spare parts from Europe are not available. I found what I was looking for at rianthongbangkok.com. You were able to send me the spare part for the Rolex watch cal.3135. Thank you so much! So this repair could be carried out and the clockwork works again perfectly.

The accuracy of the clock was somewhat, 10 seconds in plus. A Rolex 3135 does not have a spiral key for regulating. There are 4 small weights on the balance wheel, the position of which can be changed to the outside tire. In my case, the mass had to be increased a little. A quarter turn to the right, i.e. outwards, was sufficient. The accuracy was now:

Dial up +3 seconds a day
Dial down +5 seconds a day
Crown down - 2 seconds a day

Now the case and bracelet have been cleaned and the seals replaced. This watch will now delight its owner for the next 7 years. Please remember. After 7 years, a mechanical watch should be brought to service.