Table:
text: Remington Model 1858
Model series
Model series
Model Frame Years_Mfg_d Calibers Production Barrel Notes_
Remington-Beals Army Model Revolver Large 1861-1862 .44 1,900 (estimated) 8 inch octagon 
Remington-Beals Navy Model Revolver Medium 1861-1862 .36 14,500 (estimated) 7 1/2 inch octagon 
1861 Army Revolver (Old Model Army) Large 1862 .44 6,000 (estimated) 8 inch octagon 
1861 Navy Revolver Medium 1862 .36 7,000 (estimated) 7 3/8 inch octagon 
New Model Army Revolver Large 1863-1875 .44 122,000 (approximately) 8 inch octagon Used for factory conversions in .46 RF & .44 Remington
New Model Navy Revolver Medium 1863-1875 .36 28,000 (approximately) 7 3/8 inch octagon Used for factory and U.S. Navy conversions to .38 RF & CF

text: Remington Model 1858
Model series
Model series
Model Frame Years_Mfg_d Calibers Production Barrel Notes_
New Model Single Action Belt Revolver Large 1863-1875 .36 percussion and .38 CF 2,500 - 3,000 (estimated) 6 1/2 inch octagon Factory conversion production started in 1873
Remington-Rider Double Action New Model Belt Revolver Large 1863-1873 .36 percussion and .38 CF 3,000 - 5,000 (estimated) 6 1/2 inch octagon 1863-1865 available with fluted cylinder, conversions had two-piece cylinder
New Model Police Revolver Medium 1865-1873 .36 percussion and .38 RF 25,000 (estimated) 3 1/2, 4 1/2, 5 1/2, 6 1/2 inch octagon Conversions all believed to be rimfire only
New Model Pocket Revolver Medium 1865-1873 .31 percussion and .32 CF 25,000 (estimated) 3, 3 1/2, 4, 4 1/2 Majority produced as conversions or cartridge

Question: Which model is the only Remington Model 1858 with the lowest caliber?