USA, 1836: Brown's Iridium-tipped Gold Pens (NYC)

1836: 1 Ozt. Platinum (UK: Semi-Mfg, Trade)  = £ 1.20 (USD$ 5.83)  
1836: 1 Ozt. Platinum (UK: Mfg, Trade)  = £ 1.75 (USD$ 8.51)

1836: 1 Ozt. Platinum (USA: UK Mfg, Ret.)  = £ 3.60 (USD$ 17.50)
 
1834:  Hawkins' Iridosmine tipped nibs first (wholesaled?) in London = £ 1.05 (USD$ 4.34) 


1836: 1 Iridium-Tipped Gold Pen (London: Retail)  = £ 1.00 (USD$ 4.86)

1836/7: Iridosmine tipped nibs (UK-Mfg) first retailed in New York = USD$ 10.

1849: Brown's Gold Pens, w/o Iridium (wholesaled?) in New York = USD$ 2. 

1849: