Nice display of US early/mid 1920 bombs
The presence of a Barlow bomb is suggestive of an early date as it was used only for testing, its production being cancelled after testing done together with the French in September 1918 at La Ferte-Allais
The denomination of US bombs passed through various steps between 1917 and the 1930s - the denominations given here are the one used in the early-mid 1920s
Laying on the cart:
Lower row:
Aeroplane Flare Mk I ( = French Michelin Eclairante VM3)
French Michelin 115 long
Upper Row:
French Michelin 90mm
French Chanard Incendiary
French Michelin 75mm
Top Row:
Barlow Fragmentation bomb
Suspended left to Right:
Incendiary 40lb Mk I (black powder and turpentine)
(this is a guess - it's impossible on this sort of photograph to differentiate 40lb incendiary, 46lb Incendiary and 50lb Demolition - though the order of placement and the fusing are suggestive)
Incendiary 46lb Mk II (thermite)
Fragmentation 19lb Mk II / II-A (ex-Fragmentation 17lb Mk II)
Fragmentation 19lb Mk II-B (ex-Fragmentation 25lb Mk III = US made 20lb Cooper bomb)
Drop Bomb 25lb Mk II (ex- Demolition Bomb 25lb Mk I , phased out - for exercise only)
Drop bomb 50lb Mk III (ex Demolition Bomb 50lb Mk I)
Drop bomb 100lb Mk I
Drop Bomb 300lb Mk IV
Drop Bomb 600lb Mk V (or the earlier Demolition Bomb 550lbs Mk V)
Drop Bomb 1100lb Mk VI (or the earlier Demolition Bomb 1000lbs Mk VI-A)
A couple of other very similar photos (keep in mind that the left and right photograph have a different scale):
Frag 19lb (20lb Cooper)/ Frag 19lb (17lb Frag) /Incendiary 40lb/ Incendiary 46lb/ Michelin Flare VM3
Demo 25lb / 50lb / 100lb/ 300lb / 600lb/ 1100lb
And a better one
On the testing of the Barlow Fragmentation bomb and the resulting recommendation to cancel its planned production:
(Original reports, included as addenda to the US Senate hearings on armament production)






