Found Some Current Machine Cancels On USA Envelopes (2013)

Whilst at the day job, I like to glance at the envelopes stapled to my received forms to get a feel for what stamps people buy or use(or mainly to see if there's some nice current ones to put on my to buy list) and I noticed that in late April El Paso, TX and San Antonio, TX had the old machine cancels and not spray ons.

I have no clue when they run it, how many exist, or anything, but apparently some still do. I'd love to have gotten a scan, but unfortunately that's most likely a federal crime for me. I do wonder the story behind it and if there's a chance I can get a postcard run through the machine.