Hello Stotty1111, cheers everyone.
After your precious indications I did a search on the internet.
As I have already written, in the post-war period I have books on many navies but not on the German one.
I entered the ship P6141 in the search field.
All sites list this vessel as the Type 148 class
called the Tiger class
Fast Attack Missile Craft
derived from the French Combattante II class ships.
(I will insert the characteristics of this type of ships at the end of the message for anyone interested)
I discovered that the P6141 is one of the twenty ships of this class, precisely the first, the leader of the class called S41 TIGER (entered into service in 1972 and sold to the Chilean Navy in 1998 with the name of Teniente Uribe (LM-39), in disarmament since 2015).
There are many similarities with the model that was given to me but also many differences.
Compare the first three attached images.
Similitudes
The hull line is certainly very similar if not the same as that of the scale model.
The general layout seems very similar (bow gun-superstructure-anti-ship missiles).
The proportions are very similar.
The gun on the bow is very similar and could actually be the 76/62 Oto-Melara.
The rear twin gun could be the Bofors 40/L70.
There are the big launchers for the anti-ship missiles.
The main superstructure looks the same (the windows are very similar).
The scale ship has four propellers like the 148 Tiger class.
Differences.
There are 6 launchers for the anti-ship missiles in the scale model while there are four in the Tiger class. It is possible that in the scale model the launchers are for anti-ship missiles smaller than the Exocet missiles with which these units were equipped. Or the model maker invented this detail and was not faithful to the original.
There are four launchers (four tubes) of an unknown weapon system on the scale model while it does not exist on the Type 148 Tiger class (as can be seen in the second attached image, red arrow).
The cannon in the scale model is double-barreled and is located amidships while the cannon of the type 148 ships has a single barrel and is located behind the anti-ship missiles (as can be seen in the second attached image, yellow arrow).
On the scale model there is a structure above the deck that reaches amidships but which is not present in any ship of the type 148 class (as can be seen in the second attached image, black arrow).
On the scale model there are two tubes on the deck amidships, probably torpedo tubes (as can be seen in the third attached image, blue arrow). One of the two tubes came loose but it was there.
I thought that the other patrol boats of the same class might have some differences with the S41Tiger and perhaps be similar to the model they gave me. But no, they are almost all the same as you can see from the other attached photos.
I hypothesized that ships sold to other countries such as Greece, Egypt and Chile may have made modifications that made these units similar to the scale model I have but this is not the case. I checked the photos and the units sold remained almost identical to the German ones.
Partial conclusions:
It is possible that it is indeed a German Tiger class patrol vessel but that the modeller has customized the scale model too much, or it is not the Tiger class.
However, I thank Stotty because now I have an idea of how to create the tubular superstructures to support the radars and the various antennas.
When I carry out the restoration I will make them similar.
builder
Lürssen Shipbuilding, Bremen-Vegesack, Germany
Displacement: 265 tonnes
Length: 47 meters (154 feet 2 inches)
Beam: 7 m (23 ft)
Draft: 2.7 m (8 ft 10 in)
Crew: 30
Speed: 36 knots (67 km/h)
Armament:
1 x Oto-Melara 76/62 Compact gun
4 x MM38 Exocet SSM
1 x Bofors 40/L70 AA gun (can be replaced by mine laying rails)
8 x naval mines
https://www.seaforces.org/marint/German-Navy/Patrol-Vessel/Type-148-Tiger-class.htm