Genuine masterpiece, trully collectors grade. 
Magnificent quality carving - superb realistic, anatomically correct details.
Memento mori - tempus fugit motif. 
"tempus fugit" is a latin phrase, means "time flies"
Absolutely stunning antique hand carved okimono (object to display ) in form of human skull.
Circa 19th century.
Hand carved from single piece of b0ne.
Carved from domestic cattle b0ne (mentioned to comply with ebay policy). 
Cattle is a large domestic farm animal kept for their milk or meat. This animal is not threatened or endangered or protected by cites, the endangered species act, or any other state, federal, or international laws. It is legal to sell this item and this listing follows ebay rules.
Original fabric covered wooden base.
  Size:
About 4 5/8 in ( 11.8 cm) high including base.
About 3 1/4 in. (8.3 cm) high (skull only, not including base). 
About 3 1/2 in. (8.9 cm) wide (skull only, not including base).
Base is about 3 9/16 in. X 2 in. X 1 1/8 in.
   Weight:
About 516 grams (skull only, not including base). 
   Condition: 
Excellent original antique condition with normal charming indication of age. 
Beautiful age patina.
Absolutely no problems or known restoration. 
Minor expected stable age cracks, mentioned just for 100% accuracy. 
Brown fabric on wooden base shows minor age wear and handling marks. 
Base is old, but it's probably 20th century replacement (mention just for 100% accuracy).