Output transformer primary / secondary (OT-424L)

[ppppenguin]

Are those markings or your resistance measurements? If they are your measurements then you've identified which way it will transform and roughly where windings are tapped but otherwise they don't tell you much. You need to check the ratios with an audio generator (frequency not critical, use 1kHz for preference) and AC voltmeter. Inject into the high resistance winding to avoid any nasty surprises. You can even do it with a volt or so of 50Hz.

If you're unlucky it might be a mains transformer. In this case it may work badly for audio output. The core will probably saturate with the DC and even if it doesn't saturate its frequency response may leave a lot to be desired.