This is what you have.

Conn New Wonder I.

https://www.saxophone.org/museum/saxophones/specimen/63

An early model prior to having rolled tone holes.

Rolled Tone Holes have a little lip on the edge of the hole where the pad hits.

Yours is from around 1918 (ish)

yours is a Tenor, more desireable in the old conns.

it will need a good amount on refurbishing to make it playable.

500 to 1000 bucks worth of work to get it playing wonderful.

Its value, around the same. 1000 bucks when finished.

I buy these in the same condition for 500 or less. I then do my own work, so I am able to make a little money and enjoy making a relic like this one sing. That is my "rush", not the profit. Time is money. It takes a good 20 hours, from start to finish, to restore a horn such as this, in its "forgotten" condition, back to its wonderful near new condition.

Good Luck.