Valuation please, BSA Mercury Mk3 .22 Calibre

[steptoe1966]

Wow well i have always been told the mk3 had the barrel bolt rather than the pin , and over the years all the mk3's i had had the bolt not the pin , i wonder then yours might be a very early mk3 may be that was why asi say i looked on chambers and the mk3 they list the barrel bolt and nut and the pin it is not avalible for the mk3 as the mk3 cylinder has the deep inset for the bolt head and nut .

I would if that is where some are getting mixed up with a mk4 then they call the mk3 with the pin the mk3 and the one with the bolt the mk4 may be

you find new info everyday

good luck on the sale mate

[ken69]

Wow well i have always been told the mk3 had the barrel bolt rather than the pin , and over the years all the mk3's i had had the bolt not the pin , i wonder then yours might be a very early mk3 may be that was why asi say i looked on chambers and the mk3 they list the barrel bolt and nut and the pin it is not avalible for the mk3 as the mk3 cylinder has the deep inset for the bolt head and nut .

I would if that is where some are getting mixed up with a mk4 then they call the mk3 with the pin the mk3 and the one with the bolt the mk4 may be

you find new info everyday

good luck on the sale mate

Totally confused now. Just looked at the Chambers diagram and it looks like the Mk3 has the pin "Mk3 Pin - DP033" and what Chambers are calling the Mk4 has the bolt B1316. However, the barrel part numbers for the Mk3 and Mk4 are the same. Very strange as the bolt would need a larger hole diameter than the pin

[T 20]

Totally confused now. Just looked at the Chambers diagram and it looks like the Mk3 has the pin "Mk3 Pin - DP033" and what Chambers are calling the Mk4 has the bolt B1316. However, the barrel part numbers for the Mk3 and Mk4 are the same. Very strange as the bolt would need a larger hole diameter than the pin

The bolt is the same diameter as the pin so the barrels have the same hole size, Ken.

The bolt head and nut are a larger diameter than the shank and the tension on the jaws is altered by shims.




All the best Mick

[ken69]

The bolt is the same diameter as the pin so the barrels have the same hole size, Ken.

The bolt head and nut are a larger diameter than the shank and the tension on the jaws is altered by shims.




All the best Mick

Thanks Mick, any idea how many Mk’s there were of the standard Mercury and which ones had the pins

[T 20]

Thanks Mick, any idea how many Mk’s there were of the standard Mercury and which ones had the pins

MK1 and MK2 definitely had pins, I have a MK3 cylinder with a cross bolt --- from this thread it appears that not all MK3s had a cross bolt.

This is no surprise as BSA have a history of building what are called transitional guns which use up parts from the previous MK.
As an example, I've had a very early MK2 Airsporter in for repair that had no scope grooves as the cylinder was from a MK1 Airsporter --- BSA just used up the left over MK1 cylinders on the early MK2s.




All the best Mick

[ken69]

MK1 and MK2 definitely had pins, I have a MK3 cylinder with a cross bolt --- from this thread it appears that not all MK3s had a cross bolt.

This is no surprise as BSA have a history of building what are called transitional guns which use up parts from the previous MK.
As an example, I've had a very early MK2 Airsporter in for repair that had no scope grooves as the cylinder was from a MK1 Airsporter --- BSA just used up the left over MK1 cylinders on the early MK2s.




All the best Mick

Got it, now it all makes sense, what I must have is an early Mk3 as it definitely has the articulated cocking arm

[T 20]

Got it, now it all makes sense, what I must have is an early Mk3 as it definitely has the articulated cocking arm

From the look of it the transitional models numbered into the hundreds, Ken. :-

http://www.airgunbbs.com/showthread....50#post6859650

I have heard of transitional Scorpions as well, so why not a Mercury ?



All the best Mick