juvela

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stem -

FIAMME stems were offered in sizes 8,9,10,11 & 12cm

finding another would be something of a challenge as they are fairly rare

it would also likely be costly

its clamp size is 26.0mm

if you wish to reuse the bar that is on there you would want a period plausible stem with a 26.0mm clamp

two possibilities would be an Ambrosio Champion and a Tecno Tubo Torino (3TTT) Gran Prix

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Record rear gear mech -

yes, 28T is the generally accepted largest cog

with the mounting plate that has been put on there would expect it could handle a bit larger cog

anecdote -

one day in 1973 was speaking with a mechanic at a local bike shop

he had a Record model rear mech on his machine

it was paired with a surprinsingly large gear block of at least 31T and possibly larger

asked him about it and he showed me how it easily shifted on and off the large cog

do not know what he had done to get it to perform like that...

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