Your command, a middle weight mech company (you know 1-3 heavies, 6-9 meds, 2-4 lights), is kicking back on whatever mercenary world you call home, having successfully completed your last contract. Or at least successfully enough to keep creditors away, which is sufficient unto the day.
It is after hours, and you are at your favorite watering hole with a few friends. You know in the next few days you have to start making a serious effort to find a new contract as well as the replacements for lost personnel. While you are belly'd up to the bar, someone you do not know plops down on the stool next to you. After ignoring the interloper for a bit, you notice they keep looking at you, almost as if they want to be invited into a discussion.
Finally, so you can get back to your busy plans of doing nothing you decided to confront the intruder.
"Can I help you?"
Your un-invited guest at the bar wants your company's help to restore them to their position (a minor throne, the CEO's seat, captain's chair on a dropship, whatever) that was robbed from them by some pretender. The un-invited guest presents a pretty work-able plan to get their position back, and yeah it does look like you company can execute the mission with little fuss. But it sounds too easy . . . too good . . .
. . . and then they throw out the topper . . . they do not have many funds up front for this mission- enough to cover your initial operating expenses (think JS/DS rental and supplies) but they will give you a lot of cash . . . and, the topper, a mech . . . fully functioning and in great shape. It may not be brand new, but it's condition is well above standard. You do not believe them, but they show you a holo with the mech sitting in a dropship cubicle with a old fashioned printed paper from that day with a current headline!
What is the mech that would convince you to take the contract in . . .
. . . 3025?
. . . 3045?
. . . 3055?
. . . 3065?
. . . 3075?
. . . 3135?
. . . 3145?
. . . 3150?
Edit- Nothing outrageous like a Clan mech in 3025 or