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. 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

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

A customer from Chiang Mai has given me this valuable Patek Philippe Calatrava Automatic Men's Watch Trustfully for repair. The Kal 28-255 movement is just 2.5mm across and is housed in such a 18ct gold case. At first glance, I realized that water must have entered the case and damaged the dial. After opening the clock, I see that the movement is very rusty. The repair will take some time.

After the movement was disassembled into its individual parts, I could see the entire damage. The parts of the factory fastening, the elevator and the pointer setting device, the stone bearings of the rotor and the minute tube were heavily rusted. These parts could be derusted and polished. This was not possible with the locking spring of the automatic elevator and the pointer setting wheel No. 1.

I decided to make the locking spring myself. I was able to buy a dial from a Swedish company. Unfortunately the bore of the wheel did not fit 100%. To ensure the exact position I made a brass lining.

Now that all parts have been restored, the movement can be cleaned and then reassembled. You can already enjoy the precision of this wonderful construction. The regulation of this watch is somewhat unusual and is done by rotating small weights that are on the balance wheel. Finally, the dial and hands are removed from rust and dirt. This is done very carefully by hand.