https://calibercorner.com/soprod-caliber-c125

https://www.circuitousroot.com/artifice/machine-shop/surface-finishing/snailing/index.html

https://www.60clicks.com/rolex-submariner-collectors-guide

https://www.horbiter.com/en/new-rolex-submariner-2020-model-reference-guide

https://www.ablogtowatch.com/a-brief-history-of-eta

http://www.lepsi.ch/lift-angle

https://www.awci.com/horological-glossary

https://www.fhs.swiss/berner

https://speedmaster101.com/105-012

https://www.watchtime.com/featured/tracking-the-rolex-daytona-a-53-year-history

https://www.westlab.com/blog/silicone-vs-rubber

https://www.watchesandculture.org/forum/en/mega-brands-rule-the-swiss-watch-market-i/

https://www.ofrei.com/page475.html

https://www.ablogtowatch.com/balance-springs-produced-house-h-moser-cie

https://www.60clicks.com/rolex-submariner-collectors-guide

https://www.popsci.com/science/atomic-clock-measures-time-dilation

https://www.lindahall.org/about/news/scientist-of-the-day/joost-burgi

https://www.watchprojects.com/2015/02/20/isochronism-and-the-escapement

https://calibercorner.com/eta-caliber-2893-2

https://wahawatches.com/watch-talk-whats-the-lift-angle-of-a-watch

https://alansfactoryoutlet.com/the-hardness-of-metals-a-visual-representation-of-mohs-scale/

https://www.palisadejewelers.com/resources/iso-6425-standards-dive-watches

https://www.swisswatchexpo.com/rolex-serial-numbers

https://www.economist.com/britain/2019/05/09/the-ups-and-downs-of-the-north-seas-professional-divers

https://www.fratellowatches.com/speedmaster-became-moonwatch

https://watchesbysjx.com/2019/09/editorial-movement-finishing-instagram-age.html

https://www.timepiecechronicle.com/features/2017/1/2/a-brief-history-of-regulator-watches

https://www.wired.co.uk/article/rolex-dive-watch-testing

https://gmtmaster1675.com/mark-6-service-dials

https://www.christies.com/features/Deconstructed-Audemars-Piguet-Royal-Oak-A-Series-9473-1.aspx

https://beckertime.com/blog/rolex-caliber-15201530

https://www.watchesandculture.org/forum/en/when-the-state-saved-swiss-watchmaking-part-one

https://www.60clicks.com/eta-movement-guide

https://speedmaster101.com/price-chart-2

https://legitcheck.app/guides/watches/genuine-vs-replica-omega-speedmaster

https://legitcheck.app/guides/genuine-vs-replica-ap-royal-oak

https://www.hodinkee.com/articles/seven-dive-watch-myths-deep-sixed

https://manofmany.com/fashion/watches/2013-supreme-rolex-submariner

https://www.hodinkee.com/articles/tudor-black-bay-buyers-guide

https://www.watchuseek.com/threads/terrible-quality-control-of-the-chapter-ring-on-the-seiko-5-gmt.5429863

https://www2.proz.com/kudoz/french-to-english/other/5238638-finition-traits-tir%C3%A9s.html

http://www.fhs.swiss/eng/watch_brands.html

http://www.fhs.swiss/eng/trade_press.html

https://www.telegraph.co.uk/luxury/watches/grand-seiko-history-japanese-watchmaker-determined-beat-switzerland

https://www.rolexforums.com/showthread.php

https://www.watchesandculture.org/forum/en/el-primero-the-race-to-make-the-first-automatic-chronograph

https://www.watchuseek.com/threads/swiss-made-dial-question.131045

https://www.hodinkee.com/articles/nine-basic-things-you-should-always-look-at-before-buying-a-vintage-rolex

https://www.patek.com/en/glossary

https://www.esquire.com/uk/watches/a33817512/rolex-oysterquartz-audemars-piguet-royal-oak/

https://www.watchtime.com/featured/stopwatches-at-the-top-7-chronographs-with-in-house-movements

https://en.worldtempus.com/article/watches/innovation-and-technology/cotes-de-geneve-the-striped-finish-18447.html

https://www.nytimes.com/2018/03/22/style/watches-kari-voutilainen.html

https://www.hautehorlogerie.org/en/watches-and-culture/encyclopaedia/history-of-watchmaking/

https://www.si.edu/spotlight/clocks-watches