augur

And here is the complete date run:

1879/1880 Monnaie de Bruxelles, 1886/1887/1888 Casa de Moneda Caracas 
1904/1905/1910/1911/1912 Monnaie de Paris
 
1879/80 and 1904-12 are alloyed with copper and then pickled, 1886-88 are alloyed with silver and from locally sourced gold (Guyana)
The dies were always made by the Monnaie de Paris; while all coins are reeded, the reeding varies from mint to mint with a finer and slightly higher count in Bruxelles, more of a cogwheel reeding from Paris and a rather rough one from Caracas. (I haven't bothered counting)

And another one for the stack:

The different colours gold can display...
This is indeed an interesting topic and more prevalent in LMU or UML coins than e.g. sovereign or bullion gold. 
Sometimes it has to do with the pickling: all coins below are 0.900 fine gold alloyed with silver

Left Chervonetz ("red coin"), middle and right 20 Mark; during the pickling the superficial copper is dissolved from the planchets using a strong acid (e.g. H2SO4). Depending on duration and strength of the acid the result can vary as seen above. And while it looks as if there were no UML coins on the picture, the 20 Mark are most likely made from French Francs (reparations from the Franco-Prussian War 1870). 
 
The other options is to alter the gold tone more yellow is to use silver in the alloy as in the 1887 Jubilee Sovereigns. In the few years the Mint in Caracas was operating, Venezuela did exactly this with its gold coins.

the two left coins were minted in Paris and Bruxelles respectively and show the effect of pickling nicely while the two right Ines were minted in Caracas with gold from Guyana, the traces of arsenic in the gold give the greenish tint. 

And here is the complete date run:

1879/1880 Monnaie de Bruxelles, 1886/1887/1888 Casa de Moneda Caracas 
1904/1905/1910/1911/1912 Monnaie de Paris
 
1879/80 and 1904-12 are alloyed with copper and then pickled, 1886-88 are alloyed with silver and from locally sourced gold (Guyana)
The dies were always made by the Monnaie de Paris; while all coins are reeded, the reeding varies from mint to mint with a finer and slightly higher count in Bruxelles, more of a cogwheel reeding from Paris and a rather rough one from Caracas. (I haven't bothered counting)

My only pickup from the LCF

My only pickup from the LCF

My only pickup from the LCF

And another one for the stack:

My only pickup from the LCF

Also from the London coin fair dont mind telling i paid £270 young head shield not bad cond to 

My only pickup from the LCF

Arrived today. A nice sovereign from @MikeSol - thanks Mike very nice - Also a got a Double Eagle from Hatton Gardens - wish i had noticed the graded one on the forum that is for sale before i bought this. Nice coin though.
 

My purchase from the London coin fair today. 1887 half-sovereign.
 

Some more vintage ozer's

Many thanks to @Lr103 who was absolutely amazing in helping me acquire and receive some georgeous coins. 
This is just a little selection to give you all a little flavour for the London Coin Show,  where there will be more than just sovereigns...

Stragglers arrived this morning thanks again to @Lea79 for the die crack-tastic Victoria Half and another eBay pocket money £1 Proof. 

Added a whole bunch of 1/25s to my fractional collection. A nice varied selection 

Many thanks to @Lr103 who was absolutely amazing in helping me acquire and receive some georgeous coins. 
This is just a little selection to give you all a little flavour for the London Coin Show,  where there will be more than just sovereigns...

A new Napoleon 20 Lira to go with the 40 Lira - I am trying so hard not to start a formal LMU collection!😀
 

Marc has a nice one on sale but it obviously comes with a premium

Is this yours? Lovely example 

That's what makes this forum so great – the combined wisdom of the silverforum makes it possible. 
I am not sure if anyone has started a thread about sovereign sized gold coins (similar to the 20 Franc one) but South African Pond and Peruvian Libra come to my mind...

My one...


Strike on yours seems dodgy pal, sorry

Yes- nice coins to come home to thanks-
Paddington at the Chippy was the crowning glory! 

Late finish at work- but always nice to see the spoils of the last lot of overtime I worked.
Thanks @arshimo2012 for the Dragons and @Lea79 for the 2012 Half. 




More eBay Silver £1 Proof pickups

The collection is growing! 


And two deliveries from the Royal Mint including the fabled Victoria Celebration Sovereign. 

The Sherlock 50p Silver Proof and the Nations of the Crown £1 Proof (Discount code for 50% off the £1 Proof: DSC182)

And the very nice SOTD Sovereign




And in my change at the chippy on my way home from work