I am looking for an example part to see if I can have these reproduced. Teletype Part 173979 Print Hammer This hammer fits all model 28, 35 and 37 typing perforators and reperforators. My inquiry will also include the TP 180502 Print Hammer for model 32, 33, and 38 typing units. Thanks for looking! Don Don R. House K9TTY drhouse at nadcomm.com