Help identify compressor

[rolandh]

I need some info on this compressor. At the moment it runs a coldroom which used to be a freezer room in 1996. I cant see what expansion valve is in there as it is all rusted. On the compressor make it is a coldex frigor and model 502 and was made in Brazil. I dont think the 502 refer to the refrigerant. See photos attached.
Thanks
2088

2089

2090