Can Anybody Identify This Distributor?..

Parts arrived and I swapped it in.. using the pickup only to drive the MSD 6AL . Fired it up at lunch today and it appears to work fine. Will go for a test drive after work tonight. I bought an extra cap so I can cut a hole and check rotor phasing on it as well. If the rotor is not phased well, I think I will be out of luck using it long term, as I don't think there will be anyway to adjust rotor position.