Found a Jozza Pop Art Painting? Print? + a Seahawk Turtle Endangered Species Poster - Info?

I found these at a thrift store today - the 1st - the Jozza - I first thought was a Roy Lichenstein(!) but after seeing the name & seeing he is a well known artist, I looked for my artwork.
I tried a google reverse image with my phone camera but nothing came up, and checking his website the only prints he showed/had for sale was a Betty Boops.
And besides not finding mine - I can't tell if it's a painting or a print! (although the signature appears & feels painted) - How can I tell if this is a original Jozza? (The Betty print is selling for $150, the paintings are in the $1,000's!)
PS - Either way I think it will be a easy sale - it'd make a great wedding gift!

The 2nd one is a poster entitled Endangered Species and Seahawk Turtle - again I couldn't find another when I looked for it using the poster's words - has anyone seen this before?

Thanks!
PS - The 3rd one I also found today - it's a bookstore promo poster for Bob Dylan's book 'Down The Highway' - Just wanted to show you this one (I mean, come on - it's Bob Dylan!) - hope you like it!





BOB DYLAN BOOK PROMO POSTER!

 

since there are no brush stokes it appears to be a print on canvas. Also the clean straight edges on the back of the canvas is a give away.

 

here is another one like yours bob dylan poster

https://www.ebay.com/itm/255203777073

 

Dang I thought it'd be a lit more! They only went in bookstores right?

 

https://www.grunart.com/surprise-by-jozza/

 

Thank you!
Yep mine's a print - it measures 17.5" x 17.5 for art and 19.5" x 19.5" w/frame - but it is hand signed I'm 98% sure!
Thanks again moreotherstuff!

 

Image search found it no problem.

 

Think the endangered species is from a zoo or marine park?

 

https://studioforhelios.com/collections/commemorative-posters/products/poster-10

 

Hawksbill Turtle. Mr. Seahawk was my fifth grade teacher.

 

I want a new computer because the search engine in my Aspire / windows 11 is terrible!!
Thank you again moreotherstuff!

 

On the turtle, the original poster was confused - hawksbill and seahawk are not related.