MK1 professional restore? (steering)

back to life! and i really enjoyed my first ride

i also added my “futur design” bell from amsterdam - i think it fits perfect to the design

there is just a final question about the age of this bike:
Amuro Lee research is the following: (thx for this very interesting topic)
“Bikes numbered 1 to 3000, where made by Remploy, in Glasgow, Scotland in 1987/88. These had good paint, but a heavy steel carrier” see topic:

but my bike is aquipped with this very heavy steel carrier but serialnumber is 7410?
maybe some of you know more about?

many thanks