So what? Why would that have made a difference to the people who actually fulfilled the order?
If you need to ask, then you don't understand how Klein's worked.
They needed to know the Department number to fill the order correctly, exactly because in later issues of the magazine (with different department numbers) there could be changes.
Mr. BELIN. Can you just give us one or more of the magazines in which this coupon might have been taken?
Mr. WALDMAN. Well,
this coupon was specifically taken from American Rifleman Magazine, issue of February 1963. It's identified by the department number which is shown as--now, if I can read this--shown as Department 358 on the coupon.Mr. BELIN. And that number also appears in the address on the envelope to you, is that correct, or to your company?
Mr. WALDMAN. That's correct.