Valve advice

[Johnny nocash]

Hi folks, I'm looking for advice on how to evaluate a few valves that I have.
I know that they are decent ones but if someone could inform me of what particular aspects of each (getters/plates/labels etc) I should look at.
Once I have a better idea then I can investigate further.

1. Mullard ecc83/12ax7 - these are yellow print.
2. Mullard CV 4004 (m8137)
3. GEC CV 4005

Thanks

[Jazid]

You'll get no useful information unless you supply photos.
You'll get nothing significant wrt value without measurements. They could be gold, or they could be garbage. Of course someone will pay for them even if they're clunkers, that's ebay for you.

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[da2222]

Without proper testing its nigh on impossible to discern the condition of a valve. Visibly it may look perfect yet be dead...

[Johnny nocash]

Thank you gentlemen.
I have no means of testing them. I just know they were working absolutely fine when in my phono stage for the few weeks I used it.
Here's some snaps anyway.... For what it's worth.

[Jazid]

Thanks, unfortunately again impossible to tell as the snaps are slightly fuzzy and dark. Sorry to be a moaning Minnie but they need good light, focus, and a hard white background. They appear (without these conditions) to be well used, but that may not be the case. Even if they are high mileage they may still be very good, hence the need for testing. As per my original post: impossible to say.

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[Johnny nocash]

Thanks again Jazid.
Sorry the photos are shit, I only have my iPad to use as a camera. From the replies it seems the photos are irrelevant anyway because they need testing.
I'm not looking for a valuation guys. what I'd like is help finding out the important elements. I can then look at the valves, research & then describe the key selling points ...... After testing of course. When I advertise them, I'll get better images.
Cheers

[ovlov854]

Hi folks, I'm looking for advice on how to evaluate a few valves that I have.
I know that they are decent ones but if someone could inform me of what particular aspects of each (getters/plates/labels etc) I should look at.
Once I have a better idea then I can investigate further.

1. Mullard ecc83/12ax7 - these are yellow print.
2. Mullard CV 4004 (m8137)
3. GEC CV 4005

Thanks

Hi There...............You might find this article interesting as its a comprehensive view/opinion of valves. It is of course a personal opinion but he seems to have listened to an awful lot

/www.audioasylum.com/scripts/d.pl?audio/faq/joes-tubes.html

I used this as a guide which directed me to my present GE 3 mica military 5751 and the equally delightful Sylvania version.
These are less expensive than the crazy prices asked for ECC83 and 12AX7

Basically if your valves float your boat they'e great

[Johnny nocash]

Cheers Ovlov, I will read that.
I think my original post must be misleading so I'll try & clarify.

I will be selling the valves so I'm trying to find as much info on them as possible so I can ask a fair price.
I know that they were originally NOS. They were bought as upgrades to the standard valves in a phono stage but barely used. The phono has long gone but I retained these tubes. Unfortunately I don't have written proof.

I appreciate that I will have to get them tested & provide good photos.

As I'm a valve novice I asked for information so I would have a better idea of their quality.
Cheers