Board Porn and a few questions

[TheDude80]

So i picked these up boards uo about a week ago for $25 which was a steal in my opinion. These came out of a old AT&T PBX. Early to mid 80s based on the 1984 label. No real resale value here but lots of scrap value. The power supply even had some rectangular tantalum caps as well. Several of the gold cap ceramic IC's amd several white ones with gold legs as well. There are also several components that have a "Do not open" or "danger high pressure, do not open". Anyone know what these are exactly? I did a part no. Search nit came up blank. Also in the first pick, left hand side of the red board are those tantalum caps or reg? I dont see any + sign on the board or cap itself.

All in all there is about 15-20 pounds here, not all boards are pictured. I might harvest a few of the gold ic for my collection but ill probably be sending them to eBay. I cant image a buyer paying much more then $5-7 a pound for these but i could be wrong.

[406Refining]

There are also several components that have a "Do not open" or "danger high pressure, do not open". Anyone know what these are exactly? I did a part no.

I don't think the pictures came through, but based on what you described they are likely mercury wet relays (once pictures are posted I can confirm this). Mercury relays kind of look like mini upside down bread pans. Whatever you do, don't try and manually pull them off the board! Damage to them can break the vial of mercury inside the relay and cause potential exposure.