The Gaggia Achille is out of production, but still avalable. Check out the review on HB

here are some: "Olympia Moca Grinder"

I'm still waiting for such a dumpster to walk by

I think there actually is a serial number, the plate on my machine shows "25.0244" while on yours it's 25.0213

Here is the link to the pdf: {link}

According to the table here {link} the difference would be 4.5 °F (0.75 bar ~ 116.1 °C/241 °F)

-- removing the top part: have you pulled out the hose at the back? -- cylinder sleeve: there is none as one can see on the 3rd picture here: "Jumpy lever movement on Bezzera Strega"

Yes, the Cubica has a hydraulic group - and is somewhat OT here, but the commercial levers also pictured there should make up for it, I hope

Some nice pics of a seemingly less known machine on a friendly site in German: {link} The owner will not sell

He called it "the pinnacle of the specialty coffee industry", so he obviously doesn't compare S'ucks with small local roasters around the corner or home roasters, and you may still regard your roasting as pinnacle