I bought this painting when I was on vacation in Peru. I have a certificate of authenticity that came with it from the Republica of Peru. It is signed on front and back “Kline.” I’m not an expert on art so I couldn’t tell you it’s for sure Kline or not. However,  it has “Christie’s auction” stamp is on the back, meaning at some point it went through Christie’s auction house and they only deal with artwork that brings 10’s of thousands of dollars. It also has an authentication sticker from the Republica of Peru. I’m asking $150 firm. It does have some wear (panting is starting to crack a little) but considering its age, it’s in good shape. Really nice paining from abstract expressionist Franz Kline. Painting measures approximately 19x23 inches.