RRP stands for Robinson-Ransbottom Company. I have seen these at Flea markets along with many other RRP birdbaths, huge flower pot's etc. A shaded burgandy he was asking $275.00 for one. RRP is still in business. Your shaded greens were popular in the 60-70-80ties. With the econnomy today not many people are buying these thing's. Just hang on to them until thing get better. The only thing I see selling very good in pottery is Red Wing right now. Don't confuse these with the famous Roseville vases etc. Thank You