01 / Buying Guides1
Watch case opener guide: Jaxa wrench, ball, knife
What to measure across snap-on, notched, and branded case backs, plus Jaxa sizes, friction balls, knives, and BRL/PAN dies we list.
Jaxa / friction ball / knife
Workshop guides
Watch repair tool and part instructions
Browse eight workshop guides across three groups to select tools and replacement parts. Check measurements or movement codes against our listings.
Guide groups
Three groups covering tools, sizing, and bench repair
Review buying guides for tooling options, reference tables for stem and bar sizing, or bench tutorials for case tube work.
Buying Guides
Five guides comparing openers, movement holders, crown and stem components, case presses, and listed Citizen capacitor codes.
Reference & Sizing
Two reference guides with measurement tables for winding stem threads and spring bars listed for Seiko Alpinist SPB121.
Repair Tutorials
One bench tutorial covering case tube removal, tightening, and replacement tools matched to listed tip sizes.
All published guides
Eight published guides for watchmakers and repair shops
Select a guide below to view measurements, tool mechanisms, and catalogue listings. Each entry links directly to the published article.
Read the guide
02 / Buying Guides2
ETA 7750, 2824, 2892, 2894 movement holder guide
Holders listed for ETA 7750, 2892-A2, 2892-5100, and 2894-2, 7 in 1 and 3 in 1 sets, bench clamps, and cushion sizes underneath.
7 in 1 and 3 in 1 sets
03 / Buying Guides3
Watch crown, stem, and tube replacement guide
Crowns, winding stems, crown tubes, and O-ring seals: what each part is, how to measure it, and the sizes listed in our catalogue.
Sizes, threads and O-rings
04 / Buying Guides4
Case press guide: screw, lever, and die sizes
Choose a watch case press and die: screw versus lever mechanism, how to measure the case back, and the presses and dies we list.
Screw versus lever mechanism
05 / Buying Guides5
Citizen 295-38, 295-55, 295-5100, 295-5600 guide
Movement codes and battery sizes for 295-38, 295-55, 295-5100, and 295-5600, with what each listing states.
295-38, 295-55, 295-5100, 295-5600
06 / Reference & Sizing6
Winding stem thread sizing without a caliber name
Measure the thread for movements with no caliber name, pick an extender or crown, and send the numbers. Tables from catalogue listings.
Without a caliber name
07 / Reference & Sizing7
Seiko Alpinist SPB121 spring bar guide
Spring bars and tools only: sizes, thickness options, quick release vs double flange, and measuring lug width before ordering.
Quick release vs double flange
08 / Repair Tutorials8
Case tube removal and installation tool guide
Separates the three case tube jobs (remove, tighten, replace) and matches each to the right tool, with tip sizes from our listings.
Remove, tighten, replace
Browse by caliber
Pages for a specific caliber or cell family
Every listing for one caliber in one place, so the parts that exist for a movement can be seen together.
Part number requests
Looking for a number that is not in the catalogue?
Send the number and we will check it against the catalogue and reply with availability and quantities.
What to have ready
The stamped part code, the caliber reference, or the dimensions of the part, whichever you have.
What we do with it
We check the number against the catalogue and reply with availability and quantities.
How we reply
We reply within one working day, to the email address you send from.