My calculators and slide-rules

F-502G {2009} - Canon's scientific calculator

FX-502P {1979} - Casio's scientific programmable calculator

CC-130U - Casio's card clock with currency converter/calculator

DM-15CC {2012} - A real HP 15C emulator of a credit card size
DM42 SN:00129(Dec.2017, STM32L476VGT6) - The real and enhanced Free42

FT-9S {Rev.0.00(Nov.2001)-Rev.3.26(Mar.2010)} - RPN SCIENTIFIC calculator iAppli

HP-10S

{CNG73403527}
91g

HP-12C Platinum 25th Anniversary Edition - for my little brother

{CNA64311089(Nov.2006)}

HP-15C - "Triple speed modification"

2813A61462(May.1988, 1LM2) : Normal speed
2813A62318(May.1988, 1LM2) : Triple speed, Protection diode
2614A06612(May.1986, 1LM2) : Triple speed, Protection diode
2249A03396(Dec.1982, 1LF5) : Normal speed
118g

HP-15C Limited Edition - "Workaround for the high current spike"

{CNA15000DN, Limited Edition Number 16188}

HP Pioneer series - "internals"

{2808A04492(Feb.1988)}

HP-27S (Mentor) - "LCD transplantation"

{2808A04492(Feb.1988)}

HP-32sII (Nardo) - "Reparing the 32sII with faulty key"

{ID112023476(Mar.2001), ID95201275(Dec.1999)}
120g

HP-35s - "Internal view"

{CNA72104904(Jun.2007)}
143g

HP-42S (Davinci) - "Memory upgrade and overclock"

3242S09191(Sep.1992) : Double speed, 32KB Nonvolatile, Protection diode
3005S02826(Feb.1990) : Double speed, 32KB Nonvolatile, Protection diode
2942S30206(Sep.1989) : Double speed, 32KB Nonvolatile, Voltage doubler, Protection diode
2934S30425(Jul.1989)
2909S32377(Feb.1989) : Double speed, 32KB Nonvolatile, with LDO
144g

HP-48G (Alcuin) - "Repairing intermittent key and memory upgrade"

{3404S00931(Jan.1994)}
247g

HP-50g - "LowBat(S) Warning and low self-discharge Ni-MH batteries"

{CNA 72403472(Sep.2007)}

HP Prime Version D (P/N:2AP18AA#B1S)

{9CJ948001M Dec.2018)}

EL-586 {1987} - Sharp's water proof scientific calculator

80/3 {CK(Nov.1952)} - Hemmi 10" plastic covered bamboo simplex sliderule for the electric engineering

255D {VK(Nov.1971)} - Hemmi 10" plastic covered bamboo duplex sliderule for the electric engineering

259D {VF(Jun.1971)} - Hemmi 10" plastic covered bamboo duplex sliderule for the mechanical engeneering

266 {WJ(Oct.1972)} - Hemmi 10" plastic covered bamboo duplex sliderule for the electronics