Would like to find authentic watch band for Longines

I have an Ultra Chron from 1967 according to the serial number. How can I find out which band and buckle it came with. This is a link to the same watch but not mine. https://www.truefacet.com/solid-18k...tch-1960s-cal-431-exlnt-serviced-1880229.html I'm also seeing alot of info on the 431 movement. It's rarely been worn or wound. It's over 50 years old though. Would servicing be highly reccomended? Where are the reccomended servicers? I live in Arizona. Thanks!

try some of the online guys like TimesofPlenty.

This is the bracelet for the Ultra Chron.

I'm not sure if bracelets were standard from the factory for Longines (à la Rolex) or if leather bands were standard and a bracelet was an optional extra (à la Omega). Either way, you'll find many fine options for leather straps, but you'll need to wait longer to find a bracelet.

As has already been stated, it needs a service. It's got an engine, and engines don't run for 50 years without attention.