So impatient. I told y'all I was posting from work. I'm at home now with the book in my hand.
This is the book.
What you posted is a partial list. Total production of this plane was 1720 units not counting prototypes.
England ordered 320 NA 73 and 300 NA 83 (all as Mk I), and 92 NA-91 (as Mk 1A) and 50 NA 99 (as Mk II) for a total of 762 Allison Engined P-51s.
The US ordered 458 P-51s of various subtypes (see below) plus the 500 A-36 for a total of 958 Allison Engined P-51s.
Total production was therefore 1720 not counting 3 prototypes. It was not clear to me initially if the 86 recon versions were made originally for that purpose (this is why I originally thought total production run was ~1800). But I checked and read it a bit more carefully - they were apparently diverted from British orders, converted into recon planes and used in Tunisia and from England including over D-Day. These are the production numbers:
320 x Mk I (NA-73) Nov 41 to May 42. Serial Nos AG345 to AG664
200 x Mk I (NA-83) Apr to Aug 42. Serial Nos AL 958 to AM257
100 x Mk I (NA-83) Jul to Aug 42. Serial Nos AP164 to AP 263
92 x Mk IA (NA-91) Sept 42 to Jan 43 Serial Nos FD438 to FD 567
148 x P-51 (NA-91) Serial Nos 41-37320 to 41-37469
500 x A-36 (NA-97) Serial Nos 42-83663 to 42-84162
100 x P-51A-1 (NA -99) Serial Nos 43-6003 to 43-6102
55 x P-51A-5 (NA-99) Serial Nos 43-6103 to 43-6157
155 x P-51A-10 (NA-99) Serial Nos 43-6158 to 43-6312
Of the English models 51 were converted to F-6A and 35 converted to F-6B recon planes.
Allison Engined Mustangs in Combat
According to the book, page 42, the A-36 arrived at operational units (27th and 86th FBG) in March 1943
but did not fly a combat mission until 6 June 1943 against Pantelleria and Lampedusa. It may be possible however that some of the recon (F-6) birds may have been used before that.
Michael T Russo was an ace flying A-36s with the 16th Bomb Squadron in Italy. Apparently he was the only Ace with the type which is surprising considering ~1,600 of them were fairly heavily engaged over a long period of time. Does not compare well with say, the P-40F or the P-40K. Or the say, Yak-7.
The first unit that got mauled in Burma was the 311 FB group operating out of Kyurmitola India. They had 40 A-36s plus some P-51As. November 25 8 Mustangs flew escort to B-25s to Mingaladon Iarfield in Rangoon. They were bounced by four Ki-43s from the 64th Sentai. Two Mustangs were shot down for no claims. Shortly after another escort mission for B-24s was jumped again by 64th Sentai Ki-43s, losing 4 Mustangs including the 311 FG commanding officer, Colonel Harry Melton. One Ki-43 was shot down and one made a forced landing.
On Dec 1 1943 311 FBG escorted Liberators to Rangoon, got jumped again losing 1 P-51.
On Feb 14, 1944 13 P-51As were escorting B-25s to a raid at Zaundiaing. While strafing the target they were bounced by Ki-43s from the 50th Sentai. Two P-51s were lost and 3 damaged. No Japanese losses are mentioned.
They mention two more combats in March and April 1944 in which "several" Ki-43s of 50th Sentai were shot down, and one on March 16 where 50th Sentai Ki-43s "bounced" P-51As on takeoff and one was shot down with the pilot badly burned.
Like I said, a fairly dismal air to air combat record. You'll be happy to know though the book says several times that the P-51A was way better than the P-40 and even claims it was better in combat than the P-38. Better no doubt in many ways except in the sense of shooting down enemy aircraft while not getting shot down...
It does seem like it was a good dive bomber though and that changes my understanding of the DAF a bit, the existence of a good high speed dive bomber on the Allied side definitely puts an interesting twist on the whole war in that area. The USAAF had their own Stuka and it went 400 mph and had a ~1200 mile range.
S