Purchasing a Model A Jack

[Ed in Maine]

I have been looking at Model A Jacks and have tentatively picked the "C1" version. This is the jack with three oval holes in the cast stand with a top that has been crimped over a lower piece. I want to be able to open up the top of the jack for cleaning, repair if necessary and grease and reassemble. Has anyone restored the "C1" jack and how difficult was it to open the top of the jack? Thank you, Ed