Need help with the ID of this ICSA pen

[Kikay]

Please help me identify this ICSA pen.

 

What I know about it:

1 It has a blue celluloid body and cap.

2 It has the ICSA logo, the acronym ICSA, and  Reg Inter etched on one side of the barrel.

3 It is 11 cm long, capped.

4 It has gold trims: a single band on the cap and the clip.

5 It has the ICSA logo in red and gold on its top finial.

6 It has a screw cap.

7 It has a black section.

8 The nib has quite the flex.

9 The nib has “ICSA” on it, under which is the ICSA logo, under which is “14k”, and under that is “2”.

10 The semi-cone bottom finial is a blind cap which, when unscrewed, features the button-filling mechanism.