BSA Juvenile vs Improved Mod D Sporting pattern 

These pics illustrate perfectly the delicate proportions of the Juvenile relative to the .22 cal Sporting pattern which was available at the same time.

The Sporting pattern was introduced in late 1909 and extended the ordinary Standard pattern's cylinder of 43 1/4" to 45 1/4". A larger spring (borrowed from the Military pattern), coupled with the greater swept volume provided extra power, which was double the muzzle energy of the Standard pattern in .177 cal.

Meanwhile, the second pattern of Junior rifle (colloquially known as the Juvenile) was made in .177 cal only and was a miniature version of the Sporting pattern rifle. It had a smaller diameter cylinder bore and a low power mainspring made of thinner wire than usual, to make it easy for children to cock.

Various vintage BSA group shots 

With thanks to Eddie for permission to use these pics. A superb collection.

The guns pictured above are:
Imp Mod D.......45 inch model (1908)
Standard number 2 (1925)
H the Lincoln (1906)
Imp Mod D....39 inch model (1912)
Break Action...............(1936)
Light / Ladies model.......(1922)

The guns above are, left to right:
45 inch improved model D
Standard CS
Standard No2
"H" the lincoln
39 inch improved model D
Light or ladies model
Break action model

Three rare vintage BSAs 

With thanks to our friends at the merry band of bell ringers known as the <a href="http://www.melbournemarksmen.co.uk/index.html">Melbourne Marksmen</a> for these group pics of a BSA Military Pattern, an Improved Mod D no.3 bore, and a gunlaying teacher.

Collection of pre- and post-WW2 BSA air rifles 

With thanks to Steve for permission to post this pic of his former collection:

Compilation of cylinder inscriptions 

I thought I would draw together themes from pics already in the gallery. Here is a list of cylinder inscriptions, grouped by pre- and post- WW1.

Pre WW1

'H' the Lincoln 1st batch:

'H' the Lincoln 6th batch:

'H' the Lincon late production:

Early Lincoln Light:

BSA Air Rifle 1st batch:

BSA Military Pattern series 1:

Improved Model B:

Improved Model D:

BSA Military Pattern series 2/3:

BSA Junior:

BSA Juvenile:

BSA Standard No.1:

BSA Standard No.2:

Post-WW1

1919 "L" series:

"L" series:

"S" series:

"CS" No.1

"CS" no.4:

"A" series

"T" series:

Breakdown pattern:

Junior, Juvenile and more 

With big thanks to Peter for these pics. The first two are of Juvenile, serial no. 77314, and Junior 30171. Note the Juvenile is roll stamped and not etched, despite having a very high serial no.

The third rifle, serial no. 41461 appears to be another Junior pattern as it has the same diminutive cylinder and cocking lever that you would expect on a Junior, but its barrel is 3in longer for some reason and it has an "adult" length stock too. According to John Knibbs, it came from a batch of rifles that included 7 Junior patterns. (Or is there another explanation?)

The next three pics show these three rifles, plus a Standard pattern Improved Mod D and two post-WW1 Standards.

Compilation of BSA Imp Mod stock markings 

With thanks to a collector friend for letting me take many of these pics.

This from a BSA Air Rifle, 1st batch:

Three BSA Juniors 

With thanks to Peter for these pics.

Four pre-WW1 BSA Juniors 

With thanks to Craig for pics of his friend's collection in RSA.

3x BSA rifles, pre-1910, -1920, -1930 

With thanks to Chris.

Andy's BSA collection 

With thanks to Andy.

Prewar BSA collection 

With thanks to Andy.

Pre-WW1 Standard and post-WW1 Light 

With thanks to Louis.

Early BSA underlevers 

With thanks to Andy.

BSA collection (including regimental air rifle?) 

The owner says:

One of the light patterns is missing rear sight, I'm still searching for replacement. The other light pattern has no markings on the trigger block (possibly a replacement) but has a very unique queen's royal regiment medallion on the stock...

After a bit of searching I believe it’s the Paschal Lamb with St. George’s flag from the Queens royal regiment (West Surrey) WW2

The Queen's Royal Regiment was a line infantry regiment of the English and later the British Army from 1661 to 1959. In 1921 the regiment became the Queen's Royal Regiment (West Surrey).
It ceased to exist as a separate regiment in 1959 when it joined with the East Surrey Regiment, to form The Queen's Royal Surrey Regiment.

Etched BSA collection 

With thanks to Karl.

Collection of early BSA underlevers 

According to a post by RedRoyRegulator on airgunforums.co.uk, serial numbers from lowest to highest are 3620, 3962, 6174, 12742, 15122, 18512.

Karl's BSA collection 

Top to bottom: 1912 45 inch Improved Model D sporting pattern, 1919 'Improved Model D' light pattern, Standard light pattern, Standard pattern 45 inches, 1906 "BSA AIR RIFLE" .177, 43 1/2 inches

BSA Juveniles and Juniors 

With thanks to Peter.