"Dear Mr. Stephen Lawson,

Greeting from sunny and very hot Kiev! With this message I inform you that a parcel with two new model kits. The 1:72 Nieuport 27 C.1 (# 061) & 1:48 DeHavilland DH 4 with RAF3 engine and will be sent to your address in several weeks. Please, let me know as soon as you receive it.
Sincerely,
Olga"

Nieuport 27 C.1:
The Nieuport 27 was a French biplane fighter aircraft during World War I designed by Gustave Delage. The model 27 was the last of the line of Nieuport "V-strut" single seat fighters stemming from the Bébé of early 1916. A few operational examples supplemented the very similar Nieuport 24bis in operational squadrons in late 1917 but most examples of the type served as advanced trainers. It basically was an up engined type 24 with a split axle like the Sopwith fighter types.

Airco DeHavilland DH 4
The Airco DH.4 was a British two-seat biplane day-bomber of the First World War. It was designed by Geoffrey de Havilland (hence "DH") for Airco, and was the first British two seat light day-bomber to have an effective defensive armament. It first flew in August 1916 and entered service with the Royal Flying Corps (RFC) in March 1917. The majority of DH.4s were actually built as general purpose two-seaters in the USA, for service with the American forces in France.

The DH.4 was tried with several engines,this version had the The RAF 3. It was a British liquid-cooled, V-12 engine developed for aircraft use during World War I. Based on the eight–cylinder RAF 1 it was designed by the Royal Aircraft Factory but produced by the two British companies of Armstrong Whitworth and Napier & Son. The RAF 7 was a high compression version of the same engine.

RAF 3 1914 - Prototype engine, 200 horsepower (150 kW).
RAF 3a 1914 - Main production variant, increased bore, 260 horsepower (194 kW). 29 built by Armstrong Whitworth, 260 built by Napier & Son.
RAF 7 300 horsepower (224 kW) high compression version with high-lift camshafts.