Hmcs agassiz 1941

I have been looking forward to building a short fo’c’sle Flower for some time. I also have the Anatomy of the ship book on that ship, The book also has lines plans for the hull, and comparisons between short and long fo’c’sle.

The Kit is by Black Cat Models

The cast resin hull.

The undercutting under the fo’c’sle, very nice indeed.

The resin superstructure parts.

The plethora of 3D printed parts.

There is also a small etched fret with railings and the suchlike, and turned brass masts.

Keel laying with the next few weeks.

Cheers, Si


I’m a long time Flower Class fan and looking forward to following along on your build. It looks like a nicely done kit.



Hi Colin,

Welcome aboard. I must admit a soft spot for the Flower class and a huge respect for the men that served on them. Those little ships certainly punched above theer weight, considering most of their crews were Hostilities only and reservists. The Kit is very well done, the resin castings are crisp, all four of them. The 3D printed parts are good quality and the instructions are clear. Black Cat now has 5 Flower class in 1/350, another short fo’c’sle three very different long Fo’c’sle.

I am very much looking forward to building this one.




I have made a small start on the Agassiz.

The hull with the pour stub.

The pour stub removed and mostly cleaned up, at this stage just needed a final light sand.

The hull as been sprayed with Tamiya TS66, quite a good match to AP507B, and masked off ready for the lower hull to be sprayed anti fouling red…

Lower hull sprayed, and deck painted Tamiya XF77, with the old hairy stick

I have started to prep and paint some of 3d printed and etched parts.

There might be a short break in posts, Mrs Duster’s Birthday next weekend, so I doubt workshop time will be forthcoming.

Back soon,

Cheers, Si


You’re aware 507B “Medium Grey” didn’t exist, I assume? That’s an error made by Alan Raven in the 1970s when he had a bunch of old paint samples, a bunch of names and married them up until he had none left. It’s been widely repeated by other authors who don’t do proper research and just copy other peoples’ homework since, but nevertheless it didn’t exist. 507B existed, but it was identical to 507A in colour i.e. dark grey, only 507B had a glossy finish and 507A was matt.

The 1936 formula finalised the colour used until the early 1950s as published in AFO 2680/36 (NS 3501/36)(05/11/36).

Dark grey paint, Pattern 507B
Pattern 409 White Lead 21lbs
Pattern 104 Zinc oxide 56lbs
Pattern 689 Paste Driers 3.5lbs
Oil, linseed, raw 12pts
Oil, linseed, boiled 8pts
Turpentine substitute 2pts
Pattern 370A Blue-black paste 7lbs
Ten pints of dark grey enamel, Pattern 11, to be added to each cwt of paint

The Pattern 11 dark grey enamel made 507B harder wearing and glossy, a peacetime decision made in the late 1920s because battleships were repainting on average 8 times per year trying to stay looking smart and a tougher paint was desired.

Gloss paints were both expensive and undesirable in wartime due to reflection and glare though:
AFO 211. Mixed Paints (N.S./D.A. 1106/38-19.1.1939.) states the following:

Mixed Paints
Dark grey paint, Home Fleet shade, for other than weather work, is being added to the Authorised List as Pattern 507a. The formula is the same as Pattern 507B except that the enamel is omitted.
2. The description of Pattern 507B has been amplified to read:- “Paint mixed, dark grey, Home Fleet shade, for weather work”.

We see in this important AFO that Pattern 507A and 507B are both Home Fleet shade and featured identical pigmentation, only including or excluding the enamel paint and intended for different parts of the ship.

On the 17th of October 1940 AFO 3935.- Economy of Paint during the War (D. 12427/40.-17.10.1940.) was published giving the following orders to the fleet (orders (i) and (ii) omitted as not relevant to paint discussion):

During hostilities it has been decided that considerable economies are to be effected in the painting of H.M. ships and auxiliaries. The following instructions are, therefore, promulgated for information and guidance:-
(iii) Finishing Coats:- The use of enamel is to be entirely suspended for the duration of the war in all ships, when stocks in the dockyards have been used up. For internal work … . For external work two coats are to be applied. For parts visible from outside the ship, the finishing coats are to be matt paint.
(iv) Varnish.- The use of varnish on spars is to be discontinued, wood spars generally are to be painted.
(v) Decks.- Bare steel weather decks visible from the air are to be painted with two coats of red oxide of iron followed by two coats of non-slip grey paint. Bare steel decks below …

Effectively this would have suspended 507B shortly thereafter and this was confirmed in AFO 4074 Economy in the Use of Zinc Oxides (D.8136/41 – 18. 9.1941) which explicitly discontinued the use of 507B during the period of hostilities.


Hi Jamie,

Thank you for looking in.

Actually I didn’t know, 507B didn’t exist, I reckon I have been guilty of copying other peoples homework, but am always willing to learn.