Use an ohm meter and separate the leads: two of them most likely will be the primary coil (somewhere in the mid-to high 100 ohms).
The remaining four are likely from the two secondaries: each coil has an input and output lead. Series connection of the two secondaries will probably get you 200Ω output, parallel 50Ω.
I would run this transformer in the 200Ω output configuration, which would be similar to the series connection of a T14/1. (The AMI T14 secondary output is already wound for 200Ω, hence only two leads.)