Hi, I got these from an auction, does anyone know these watches?

Nice little collection there. I am not familiar with Tressa or Helsa. Citizen is one of the larger brands and that looks like a nice titanium field watch. Rotary is a British brand producing primarily budget quartz watches similar to Timex or Armitron. John Cleese did ads for them. Buren is a Swiss brand that I believe went out of business in the '70s and was resurrected around 2000 by the Swatch Group, but I am not certain about that.

Thanks for that info 🙂. I’m new to watches and wouldn’t have a clue unless you told me. I best clean them up 

That coffin bracelet on the Tressa is pretty fantastic!

Thanks, I’m going to clean them up later. 

Just to add that Buren were bought out by Hamilton in the late 60s I believe

Tressa was a Swiss manufacturer that went bust in the 70s,that looks an early model so I'd put it in the late 60s,later designs were more bling and I think it will be an automatic, citizen looks like an early eco drive,so it's not a battery you'll need but a capacitor(different type of battery, basically a rechargeable one) looks like an early quartz rotary,buren is one I've not seen and the helsa is sort of a microbrand from the 60s to early 70s most likely a wind up with a basic Swiss movement, see them up for sale on e Bay sometimes. Cool little stash you've got and if you didn't pay a lot for them all the better. Google the names and I'm sure you'll get some info. I'd be interested to see what's inside that Buren and that tressa has a cool bracelet. 

Buren was a fairly influential company in it’s day.  Buren invented the micro-rotor movement and licenced it to Hamilton for their Thin-o-matic line of watches in the late 50’s and 60’s.  Hamilton was happy enough that they later bought Buren completely.

Buren was critical in the race to develop the first automatic chronograph.  The Cal. 11 developed by Breitling, Heuer, Buren and Dubois-Depraz used a Buren movement with a Dubois-Depraz module mounted to it.  This was responsible for (continuously) arguably the first automatic chronograph and some of the greatest chronograph models to emerge in the late 60’s.  Naturally by owning Buren, Hamilton was able to make use of this movement in its Chronomatic line.

When Hamilton closed it’s American facilities and moved production to Switzerland, all Hamilton production was built in Buren factories.  This lasted until HMW (Hamilton) sold the Hamilton name and trademarks to SSIH (later known as Swatch).  This broke up the Hamilton/Buren joint venture and HMW let Buren quietly fade away into obscurity. 

WoW, thanks for that, I’ve clened the watches and put them on ebay