The fact it has no edge seam, likely means more technology was used to create the coin. The coin is still a novelty item that has no collectible value. Take it to a coin dealer and see what they offer.
25 cents, no U.S. coin dated 1965, 1966 or 1967 has any mintmarks.
25 cents.
The coin is still found in circulation today and it's 25 cents.
U.S. quarters were minted without mintmarks from 1965 thru 1967. This is a common coin. Depending on wear or brilliant uncirculated (MS-65) it would be valued up to $12.
All circulation quarters minted in 1965 and later are made of copper-nickel, just like dimes dated 1965 and later, and half dollars dated 1971 and later, as well. As far as values, anything you find in change with those dates will be worth face value only. Uncirculated ones will can be worth a couple of times face value.
silver content in 1867-1967 Canadian quarter
All 1967 US quarter dollars have the eagle upside down.
The coins are face value and have no silver.
25 cent.
The 1967 quarter has a bobcat on it, not a cougar. So many were issued that unless it's in uncirculated condition, it isn't worth much more than face value. An uncirculated quarter sells for about $7
If it is uncirculated it will be worth more than face value but if it is circulated it will be worth 25 cents.
US coins dated 1965-1967 don't carry mint marks, so it's not possible to tell where your quarter was minted. In circulated condition it has no added value -- there is no silver in it. A nice uncirculated one is worth about 50 cents.
You can sell it for either the price of all the quarters put together or how much the bidder wants for it. I have sold one on eBay for a lot and some people can get pretty crazy about them and bid really high. Also if you have it in a special thing that holds it that is in mint condition that shows which state and other stuff then that can bring up the value a lot.
The Canadian quarter is worth a price ranging from $8 to $10 each. The exact price will depend upon the condition of the coin.
A 1967 Washington quarter has no silver and is face value.
It depends on the defect, post new question with more detail.
All of the quarters struck for circulation from 1965 to date are just quarters.