The 152J is a polystyrene film capacitor 1,500pF 5%. Xicon manufactures them, available at Mouser.
They are for applications needing low dielectric absorption, and audio filters, timing use. Not so popular today because they are large size.
The tubular or "dog bone capacitor", usually have a large temperature coefficient to correct RF circuits over temperature. They were popular in Tektronix scopes through the 1980's.