Repair Blog

Bulova: Cal.Val23 (Valjoux 23)

Symptoms: Poor accuracy

Repair contents: Overhaul, hairspring correction, case cleaning

Repair cost: 33,000 yen

This is an overhaul of a consignment item listed on our online shop. It is a Bulova chronograph that appears to be from the 1960s. The movement is a Valjoux 23, a hand-wound two-counter chronograph. The case is 18k gold and is compact in size.

This is the condition before the overhaul. Although it is not clear from the photo, the balance spring has become deformed and is touching...

Omega Speedmaster Professional: Caliber 1861

Symptoms: Immobility (spring broken)

Repair contents: Overhaul, spring and gasket replacement, case and bracelet cleaning

Repair cost: 33,000 yen

This is an overhaul of an Omega Speedmaster Professional. It is a relatively compact chronograph with a long history of movement manufactured by Lemania. The caliber is 1861 and is rhodium plated, but the number and plating color change depending on the year.

The mainspring has broken. Whether it is a hand-wound or automatic watch, the mainspring will break when it breaks. There...

Breitling: Cal. ETA7750

Symptoms: Immobility (spring broken)

Repair contents: Overhaul, spring and gasket replacement, case cleaning

Repair cost: 33,000 yen

This is a Breitling Navitimer. The movement is based on the ETA7750, but the structure is the same.

Disassemble and clean, then reassemble.

The spring was broken, so I replaced it and reassembled it. The spring is a consumable item, so it will break when it breaks. Sometimes you can tell if it's broken by disassembling the barrel (the part that holds the spring) and taking...

Franck Muller: Cal. ETA1727-1

Symptoms: Scheduled maintenance

Repair contents: Overhaul, packing replacement, case cleaning

Repair cost: 22,000 yen

This is an overhaul of a Franck Muller Long Island. It is a hand-wound small second watch with a very simple structure. Franck Muller handles genuine products with great care, and I have heard that there are various restrictions on overhauls and battery replacements (for quartz watches). For this reason, we sometimes recommend repairs at an authorized store.

I disassembled it and cleaned it.

Rolex Yacht-Master: Reference 16622 Caliber 3135

Symptoms: Poor accuracy (advance)

Repair contents: Overhaul, spring and gasket replacement, case and bracelet cleaning, waterproof test

Repair cost: 27,500 yen

I apologize for not being able to update the blog for a while due to a high volume of repair requests.

The Rolex Cal. 3135 is probably the most common repair request. It is a very good movement, and although there are some defects, if you perform regular maintenance, it is a model that you can use for a long time. It is...