Hi Sonar, if you look at the one on my fireboat, it is all brass and hinges forward as do the real ones, look in my harbour, if its what you require I'll dig out my drawings. It will be at the Worcester Model Boat Club open day on the 10th.
Here is my version. PM me if you want this and i'll send pictures and pdf with material list and detailed build instructions1/16th scale Fireboat Mast. MATERIALS LIST. Item A:- 1.6 Brass rod 45mm long. Item B:- 5mm dia brass Finial. (from dolls house shop) Item C:- 3mm Brass tube 47mm long. Item D:- 1.6mm x 4mm brass strip 64mm long. Item E:- 2 Off 3mm brass tube 68mm long. Method of build. Start by drilling Item B 1.6mm , then drill bottom 3.1mm x 2mm deep. Solder Items A,B, and C, together to form mast top. Then drill through Item B 90 degrees to mast with 1.2mmm drill for rigging line to pass through. Item D then needs shaping, by tapering on one edge only. 2mm at end to full 4mm x 26mm from end. Do this to both sides. (see sketch). Now drill centre 3.1mm and each end 1.2mm at 3mm from ends. Item E. Flatten one end to 10mm and opposite end to 8mm. Bend 10mm end to 120 degrees. Bend 8mm end to 150 degrees. Now trim 10mm end back to 5mm. Carefully radius 8mm end and then drill 2.2mm at 3mm from end. Now solder 2 x Items E to item D and locate mast top into centre hole and solder in place. The completed mast is held in place by two angle brackets which I slotted through cabin roof and glued with epoxy. These brackets need to be drilled and tapped m2. For the fixing screws 3mm from the top edge, then radius to smarten up.