Looking for a Pyrotronics MFS-4 Data Sheet

Hey everyone,

I recently purchased a NOS Pyrotronics pull station, model no. MFS-4 (meant to replace series MFS-2 (Autocall 4015) stations on their ‘Pyr-A-Larm’ systems). I have a feeling that it will come with its official documentation due to being NOS, but I am curious as to what size hex screw these take (also bought a used MS-501) as well as their wiring diagrams. I found a data sheet as well as wiring diagrams for the MS-501, but I cannot find one for the MFS-4. I’ll update this when they arrive to see if I receive any documentation, but was wondering what category number the MFS-4 was branded as Cerberus Pyrotronics, if it was at all.

Thanks everyone!

I did some googling, and according to this page, the MFS-4 appears to be a VERY RARE variant of the MS-51 with “Pyr-A-Larm” branding and a DPDT switch. (meaning, it can optionally be connected to 2 independent circuits).