Brass wind - Origin/Serial Numbers

Trumpet Serial Numbers:

https://www.horn-u-copia.net/serial/

https://www.brasshistory.net/Getzen%20Brass%20List.pdf

Brass History/Origin Research

https://www.brasshistory.net/

https://cderksen.home.xs4all.nl/index.html

https://olds-central.com

https://holtonloyalist.com/

https://www.hnwhite.com/Serial%20Numbers.htm

https://contemporacorner.com/

https://www.everythingtrumpet.com/schilke/

Valve Alignment and custom mouthpieces 

https://bobreeves.com/

Custom Brass Makers, Repair:

https://www.austincustombrass.biz/

https://www.whyharrelson.com

https://dqscustomshop.com/

https://www.metzlerbrass.com/

Trumpet Buying Guides:

https://www.yamaha.com/en/musical_instrument_guide/trumpet/

Recommended Valves and Slide Oils:

https://www.ultrapureoils.com/all-products

Recommended Mutes:

https://www.woodmutes.com/

https://www.jlandressbrass.com/shop/c/p/Harmon-Trumpet-Mutes-x59839978.htm

Repair Tools:

https://www.ferreestoolsinc.com/

https://www.alliedsupplycorp.com/catalog/band-instrument-parts/