There are some interesting tugs used by Peruvian Navy
during 1941 confilt with Ecuador

1) "Guardián Ríos"
Former "la Boca" purchased and icorporated into the Navy on 27 Oct 1936 and renamed.

Was famous towing "Kon Tiki" on 28 Apr 1947

Renamed 1954 "Misti" was very probably transferreed to civil state services.

[www.history.navy.mil]

There was "La Boca" owned by Panama Canal, Could it bge the same ship?

2) "Grumete Mejía" incvorporated into the navy 5 Mar 1937

Renamed 1954 "Don Ricardo" was very probably transferreed to civil state services.

[www.history.navy.mil]

3)"Marinero Robles" - I have no any additional data

4)"San Lorenzo" - I have no any additional data