Paul from SWISCO responded:
October 5, 2017
Hello PB. For the S385-19 channel balance, your stamp number of "18 5" would correspond with our 1850 option. As for the S385-29 channel balance, your stamped number of "28-4" corresponds to our 2840 option. I hope this has answered your question. If you should need any further help, please let me know.
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