This is a genuine DUAL TK-24(DUAL service part number 236 242) which CAN also replace the TK-14 (215 430) type headshell.  May also be called a cartridge carrier, cartridge shoe, bracket, halterung etc) found in (or can substitute for the TK-14 originally fitted in) the following DUAL (United Audio) models:

DUAL 461 Turntable/Record Player
DUAL 481 Turntable/Record Player
DUAL 491 Turntable/Record Player
DUAL 501 Turntable/Record Player
DUAL 502 Turntable/Record Player
DUAL 504 Turntable/Record Player
DUAL 510 Turntable/Record Player
DUAL 521 Turntable/Record Player
DUAL 601 Turntable/Record Player
DUAL 604 Turntable/Record Player
DUAL 621 Turntable/Record Player
DUAL 701 Turntable/Record Player
DUAL 704 Turntable/Record Player
DUAL 714 Turntable/Record Player
DUAL 721 Turntable/Record Player
DUAL 1209 Turntable/Record Player
DUAL 1210 Turntable/Record Player
DUAL 1211 Turntable/Record Player
DUAL 1212 Turntable/Record Player
DUAL 1214 Turntable/Record Player
DUAL 1215 Turntable/Record Player
DUAL 1215S Turntable/Record Player
DUAL 1216 Turntable/Record Player
DUAL 1218 Turntable/Record Player
DUAL 1219 Turntable/Record Player
DUAL 1220 Turntable/Record Player
DUAL 1222 Turntable/Record Player
DUAL 1224 Turntable/Record Player
DUAL 1225 Turntable/Record Player
DUAL 1226 Turntable/Record Player
DUAL 1228 Turntable/Record Player
DUAL 1229 Turntable/Record Player (originally fitted with the TK-14)
DUAL 1229Q Turntable/Record Player
DUAL 1234 Turntable/Record Player
DUAL 1234A Turntable/Record Player
DUAL 1235 Turntable/Record Player
DUAL 1236 Turntable/Record Player
DUAL 1237 Turntable/Record Player
DUAL 1239 Turntable/Record Player
DUAL 1241 Turntable/Record Player
DUAL 1242 Turntable/Record Player
DUAL 1245 Turntable/Record Player
DUAL 1246 Turntable/Record Player
DUAL 1249 Turntable/Record Player