How do I tell where mine's made? Where do the new ones say "made in China"?
Up until sometime last year, it was easy.
No guitar speakers were made in China until 2002, and that coincided with the switch from ink-stamped frame codes to the paper stickers on the magnet edges. So, any speaker with the ink-stamped frame codes is by default UK.
From 2002 until sometime last year, the sticker looked like this:
In the upper right corner, it says "IPSWICH ENGLAND". That means...UK. The Chinese speakers simply have "50" in that corner.
Sometime last year, the sticker changed a little bit, and the "IPSWICH ENGLAND" is now in the middle of the sticker - the Celestion logo is moved up a little bit and it's under that. I haven't seen a Chinese speaker with the new label, so I don't know if it still says "50" or something else.