Finding relay datasheet: HC1-AC240V LR42758 30111H AP311998 3A30VDC 10A 1/3HP 125,250VAC
You don't need a datasheet. All the information is provided on the relay.

It's pretty clear from the lower photo that it's not a latching relay.



Figure 1. Close-up of relay contacts.


The coil is 240 V AC.*
There is a single changeover contact. Figure 1 shows that the white wire is connected to the moving contact armature and is in the normally closed (NC) position.
When the coil is energised the armature will be pulled towards the coil and the common will contact the normally open (NO) contact.


You should be able to visually trace each of the contacts and the white wire to pins 2, 7 and 12. You should be able to measure the coil resistance on pins 13 and 14.