Single momentary pulse to toggle on/off

Single momentary pulse to toggle on/off circuit Hi guys bringing this back from the dead…. https://www.the12volt.com/installbay/forum_posts.asp?tid=60405&KW=momentary Can someone confirm that this method works? I need a single momentary pulse to turn on and off a device, but I want the circuit to require no power while off. Is this accomplished with this circuit? I have found no specifics or details from searching, or part numbers used. Has someone that has built and tested this, confirm that it can work and with which component part numbers used. from: https://www.the12volt.com/relays/page5.asp “Single Pulse to Lock and Unlock Using a mechanical latching relay like the PCB latching relay pictured below on the left, you can use a single negative output to alternately lock and unlock the doors. The mechanical latching relay only requires it's coil to be momentarily energized to change and maintain the opening or closing of it's contacts. The SPDT relay will provide a dedicated negative output for lock when the coil is energized and a dedicated output for unlock when it is not energized.”

i do not have a part # fot the mechanical latching relay but yes the wireing  is correctbring back the rotary phone so i dont have to press 1 to proceed in english

Thank you for taking the time to reply Josh. I have built this (unsuccessfully) but am having trouble finding the mechanical latching relay that would be compatible with this circuit. Could I persuade someone into helping me locate a correct part number? From the thread mentioned, there is a picture with an “OEG” relay, with numbers OUAZ-SS-112D. Does this relay have any significance from the basic schematic shown on this site since it appears to me to be different? I have asked the local electronics supply house for a mechanical latching relay that would work in this schematic that I brought to them but have been unable to come away with a working relay. I have built this with a magnetic latching relay, but it needs to reverse the coil poles in order to work properly I believe. It there a mechanical latching relay that exists that will change the input coil charge and return the contacts from initial position (locked) [momentary push] to 2ndary position (locked) [momentary push] and back to initial position? Using one momentary push button, and require no power to maintain its position while in the off position? If this helps describe the operation I seek, as it seems to have confused a few people I have talked to. Thank you for any help completing this seemingly simple task!

I have asked and specified to my supplier that I need a relay that will LOCK into position and stay until the next momentary pulse, but I was told that this is not made, is this true?