Sambungmacan 3 was discovered in 1977 and spent some time on the antiquities market, eventually ending up in New York, where its importance was realized. It has since been returned to Indonesia. It is attributed to Homo erectus and may be the skull of a female.
For Further Reading:
Broadfield et al (2001) Endocast of Sambungmacan 3 (Sm 3): A new Homo erectus from Indonesia. The Anatomical Record 262:369-379
Delson et al (2001) The Sambungmacan 3 Homo erectus Calvaria: A Comparative Morphometric and Morphological Analysis. The Anatomical Record 262:380-397
Laitman and Tattersall (2001) Homo erectus newyorkensis: An Indonesian fossil rediscovered in Manhattan sheds light on the middle phase of human evolution. The Anatomical Record 262:341-343
Marquez et al (2001) New Fossil Hominid Calvaria From Indonesia—Sambungmacan 3. The Anatomical Record 262:344–368