The second prototype, named TsKB-19, was built in Zavod n.21 (Gor'ki) and flown in the spring of 1935 by  V.P.Chkalov.

It differed from the first prototype for:

• having a stronger, wide-track inward retracting undercarriage, pneumatically actuated;
• having a Soviet-built M-100 engine (a licence-built version of HS 12Y) with a power of 750 hp;
• having a more curved profile of engine cowling;
• having no small circular windows in front of the windshield;
• having twin water/oil honeycomb radiators on semi-retractable underwing pylons (it was the first time that a water/oil radiator was used on a Soviet airplane; this type is more efficient than classical water radiators);
• the spinner was sharper, without starter tooth;
• it could carry a bomb load of 100 kg;
• having a greater surface rudder, with a different profile in the lower part;
• having shorter ailerons and pneumatically-actuated flaps (more or less, the same difference between I-16 Type 5 and Type 10).

On 1 May 1936 the aircraft participated in the May Day festivities on the Red Square with an air display fly-by.  This plane was sent to the 15th Paris Air Show at Le Bourget in November 1936, and at Milan in 1937.  Despite the removal of the guns and gunsight and the presentation of the TsKB-19 as a sport plane, the experts understood that it was a fighter prototype, and examined its characteristics.  Openings for wing armament and gunsight are well visible in the photo of the exposed aircraft. Note that both outer wing guns openings and pitot probe are slightly moved towards the wing uppersurface. The aircraft appears to be painted white, with alluminium engine cowling and very soft-edged red tail.

On the photo aside, one can see the aircraft with apparently double blades.  The propeller was probably moved by a man whose shape is vaguely visible as a shadow on the nose.  This created the legend of a double blade propeller reported on some Czech sources.  The photo shows other aircrafts of the Soviet pavillon: the Tupolev ANT-25 record-breaking aircraft, and a nice ANT-35 airliner.

The TsKB-19 was exposed in the Central Aerospace Museum in Moscow; at first, it was displayed on the floor. It was repainted with a dark gloss color, perhaps red or dark green, with silver propeller (probably with black rear surfaces).  The canopy is in open position (slided forward); inside of it, we see the collimator tube, that protrudes when the canopy is closed. Note the alluminium frames and light grey undercarriage doors and bays. The underwing radiators are in retracted position; so, they resemble vaguely those of Spitfires and Bf-109s. Some bomb racks look visible under the wing. The M-100 engine is exposed as a separate item; its colors seem to be white, black and metal.

This photo, taken in 1943, shows that the I-17 was suspended from the ceiling to make room for a captured Me-109. The color of the aircraft seems to have changed; here it seems light with a dark nose. Here we see the Museum Director A.I. Yegorov with a group of visiting soldiers.

This image shows the I-17 suspended over Kozhedub's La-7, in the '50s or '60s. The color looks dark overall again. Later, the La-7 and many other exhibits were moved to the Monino Museum, and this move saved them.  Traces of the TsKB-19 were lost in late '80s, when the generals that directed the museum stole, sold or scrapped many exhibits taking advantage of the general confusion in the last years of URSS.