Any Other Casting Numbers?
If the casting numbers can be positively identified, perhaps the forum can make an exact match.
Photo 4: Can anyone make out all the digits? Perhaps the OP can clear off the swarf and get a better reading?
Are there any other casting numbers?
MetalMagpie suggested Hoppe's powder solvent. Hoppes is great stuff in many ways, but it is not cheap.
For the sake of economy, I'd suggest ordinary cheap mineral spirits (paint thinner) as a wipe-down medium for vises. Another inexpensive choice would be kerosene. Neither of these is as good as Hoppes, but they are more economical.
J. Ruth