Perhaps the earliest mention of the village of Przechówko appears in a bishopric census of Cuyavia-Pomerania, compiled by Bishop Hieronim Rozdrażewski. In the parish Przysiersk, near Świecie, we find a village called Brzechomko, listed immediately before Conopath. Brzechomko is almost certainly a corruption of the name Przechówko. For the year 1597-98, there were 6 farms in the village, paying tithes to the parish in the form of rye and oats. However, no mention is made of the presence of Mennonites. Certainly, if Mennonites had been in the village at that point, this would have been noted.
[“Visitationes Archidiaconatus Pomeraniae Hieronymo Rozrażewski Vladislaviensi et Pomeraniae : Episcopo Factae. (Vol 2).” Towarzystwo Naukowe w Toruniu; Fontes 2 (Torun 1898). p. 354.]
The Mennonites had not arrived yet in 1597-8, but likely arrived very soon thereafter. The first known land contract for the village started in the year 1640. A very common arrangement for these leases was a 40-year term. Therefore, we could conclude that the known lease, beginning in 1640, was actually the second contract for Mennonites in the village. The first probably was established in 1599 or 1600, and then was renewed in 1640.
The full text of Visitationes Archidiaconatus Pomeraniae Hieronymo Rozrażewski can be found here: https://kpbc.umk.pl/dlibra/publication/2326/edition/3100/content