Antique Green Slag Table Lamp. Ornate

Antique Green Slag Lamp. Ornate decorations. Stands ~22" tall. Base is ~19 in. I see only one break in the fancy metal on shade. That took time to find. Does not weaken the lamp in any way or lessen it’s beauty. . The only marks I find on this is a number on lamp base. Looks like “1892". Shade is very heavy. Base has a look of brass. Some darkness. Patina. Old cord in good shape and lamp works. Light switch is marked “p&c. I have no personal knowledge of this lamp. A friend bought it from an estate sale 20 years ago. It looks very old. I see no damage to the green glass ? slag shade. It is just beautiful. Please ask questions. I am not a lamp dealer and we will be are selling this as is. More pics as needed.