Thank you for submitting your items for appraisal. Thease appear to be black / white prints with extra red after chinese ink paintings. The offset printing grid is clearly visible and the black "ink brushstrokes" appear blurred. Most of the The overprinted red collector seals are purely imaginary. The supplier of this decorative wall art must have been active in the 1960s or 1970s. Similar prints sell in the price range listed above, as it is just home decor. There is no measurement for the sentimental value you might attach to it.