Atwater speaker questons?

[HiFiCanada]

I have the Atwater-Kent type E-3 speaker, aprox 12 in dia and it has speaker cloth on the front and back, it's the one in my avatar.
I also have the Atwater-Kent type E speaker, aprox 15 in dia,looks the same as the E-3 but it does not have cloth on the front.
I can't find much info if it is suppose to have grill cloth on the front or not, I see some that do and some that don't.
Does the type E , 15 in speaker suppose to have cloth on the front?

I got cloth ordered for the small E-3 speaker, as it has a hole in the fabric, so I will be covering both sides of that speaker. I got to take it appart, anything I need to be very carefull with, before I try to push the front cover ring off?
Both speakers work.