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KNM-ER 813 is a well preserved talus of an unknown Homo [1]. It was found in Area 104 of Koobi Fora, at 4m below the A2 marker and is dated to  ~1.78 Ma [2][3].

KNM-ER 816 is an isolated left maxillary canine and some tooth fragments classified as that from a Paranthropus boisei [1][2]. These were found in Area 104 of Koobi Fora at 4m below the A2 marker in the KBS member and stratigraphically dated to ~1.78 Ma [3][4]. 

PMU M3550 is an isolated right upper molar (M3). It is the first-ever Homo erectus pekinensis specimen found. It was recovered by Zdansky in Zhoukoudian Locality 1 in 1921. This specimen, together with a second tooth recovered from Zdansky’s laboratory later on and two more teeth discovered at a later date from the Zhoukoudian collections are the earliest collected Homo erectus pekinensis samples from the Zhoukoudian deposits. All four teeth are currently housed in the Museum of Evolution at Uppsala University in Sweden. These four teeth are among the most treasured finds in palaeoanthropology, not only because of their scientific value but also for their historical and cultural significance [1][2][3][4][5].

K11337:3 is a single left lower molar (M1) fossil found by Swedish palaeontologist Anders Birger Bohlin on 16 October 1927, in Zhoukoudian Locality 1, locus A, layer 5. It serves as the holotype specimen for Sinanthropus pekinensis since Black [1] used this single specimen to create a new genus and species name for Peking Man. Black was able to do this in part because Zdansky had already found two human teeth from the Zhoukoudian deposits prior [2][3]. Sinanthropus pekinensis has ceased to be used as a scientific name and has been replaced by Homo erectus pekinensis [4][5]. 

Unfortunately in 1941, on the outbreak of the Second Sino-Japanese War,  this specimen together with the whole collection excavated from 1928 to 1937 was lost during transport to the United States for safekeeping. This includes numerous remains of Peking Man (> 40 individuals) including five skulls [6][7][8]. Only the two diagnostic teeth found by Zdansky and a few crates of Zhoukoudian material sent to Uppsala University in the 1920s remain [9].

OH 6 was recovered from Bed I of FLK I in Olduvai Gorge. It is comprised of a mandibular third premolar, right maxillary first molar, right maxillary second incisor, and six calvaria fragments from a 5-6 year old Homo habilis child [1][2]. It is one of the hominin remains found in FLK Level 22 [2], which is bracketed by two volcanic tufts, both dated to approximately 1.84 Ma [3][4][5][6].